Solution of triangles Questions and Answers

60 94 2x

72 Use the diagram of two triangles shown below to answer this question sisaln A 12 cm B 6 cm A C 15 cm E D Triangles ACD and ABE are similar What is x equal to 15 6 9 59

Find the measure of each numbered angle m 1 T R 2 60 W 30 S m 2

A O b B 33 69 C 45 C OD 67 38 134 76 D is the midpoint of AB What is mZA A 22 62 15 D 24 B

12 3 4 Determine whether or not the side lengths can be sides of a triangle 9 40 41 6 9 16 5 10 15 15 12 9 2 5 3 5 6 4 4 4 20 10 9 23 16 7 1 point These lengths can be the sides of a triangle 13 in 13 in 26 in True False 1 point These lengths can be the sides of a triangle 6 m 7 m 12 m True False 1 point These lengths can be the sides of a triangle 3 km 3 km 3 km True

Question 1 In A JKL if mZJ 90 then ZK and ZL are OA Acute OB OC Congruent OD Obtuse Complementary

5 3 3 points Match the angles by smallest middle and largest angle C smallest angle largest angle middle angle 3 points Match the angles by smallest middle and largest angle 4 largest angle smallest angle middle angle

1 2 3 points Match the sides of the triangle to longest middle and shortest side A 63 70 longest side A 47 shortest side middle side 65 3 points Match the sides of the triangle to longest middle and shortest side B longest side C 40 shortest side aiddle side BC C AB AC AC BC BA

Problem 11 Let A B C be a triangle and let PO be an arbitrary point Let P1 be the 120 rotation of PO around A Let P2 be the 120 rotation of P1 around B Let P3 be the 120 rotation of P2 around C Let P4 be the 120 rotation of P3 around A etc Prove that if P2019 PO then ABC is equilateral

1 5 points 4 sin 2x 7 sin 2x 3 0 2 5 points 2 cos tan x

Apply the distributive property 3r In 5 7ln 5 7r ln 3 Collect r terms on one side of the equation Part 2 5 Part 3 of 5 Factor out r 7 ln 5 7r In 3 3r ln 5 Oino

In the triangle below ZR is a right angle Suppose that mZP 4x 23 and mZQ 3x 32 P R 4x 23 3x 32 Q a Write an equation to find x Make sure you use an sign in your answ Equation b Find the degree measure of each angle m P mZQ mZR 0 0 X X

1 In parallelogram ABCD mzB 9x 3 and mzC 3x 33 What is the mzD Explain how you know B C 07 D A

Triangle ABC has altitude h B A C X ih 27 D b y a C Move the options to the spaces to complete the proof of the Law of Cosines which becomes By the definition of cosine and multiplication y a cos C Then by subtraction and substitution x b acos C By the definition of sine and multiplication h a sin C By the Pythagorean Theorem by substitution By the distributive property the equation becomes which factors to Pythagorean Identity the final equation is h 1 2 a sin C cos C b 2ab cos C By the c asinC b a cos C 2 a sin C b 2ab cos C a cos C a b 2ab cos C

Look at this diagram S T R If PR and SU are parallel lines and mZUTV 123 what is mZSTV

9 Solve the triangle with a 7 95 a 35 78 B 43 99 Use degree measures for angles and round each answer to its nearest 100th

15cm B 10cm D A 200m P E 15cm ADPE ABDP x y find x 8 8 of a to s o f e 8 9 8

nd all solutions to the following triangle Round your answers to one decimal place If either triangle is not possible enter NONE in each corresponding answer blank A 110 1 a 45 8 cm b 24 4 cm st triangle assume B 90 0 O cm cond triangle assume B 90

Which statement is going to prove the two lines below are parallel 4 2 5 3 7 25 24 180 41 43 22 27 28 25 180 line 1 Transversal line 2

For the following 2D system, a) find fixed points, b) linearize the system, c) classify eigenvalues of each fixed points and d) sketch phase-portrait. x = y + x - x³ y = -y

In ΔWXY, w = 2.5 inches, y = 2.4 inches and ∠Y=122°. Find all possible values of ∠W, to the nearest 10th of a degree.

Two events, A and B, are independent. P(A)=0.3 P(A and B)= 0.24 What is P(B)?

Which of the following triangles can be drawn? an obtuse triangle with side lengths 5, 5, and 5 units a triangle with two obtuse angles a triangle with three acute angles a triangle with one right angle, one obtuse angle, and one acute angle

diameter = radius= 17. Find the diameter and radius of a circle with a circumference of 20.1 cm.

Match each of the following sets of measurements with the number of unique triangles that can be created. One unique triangle More than one triangle No possible triangles 3 angle measures 2 side lengths and the included angle 2 side lengths and the non-included angle 2 angle measures and the included side Side lengths of 3 cm, 6 cm, and 8 cm Side lengths of 2 cm, 7 cm, and 10 cm

Which of the following represents the sides of a 30°-60°-90° triangle? a. 10, 10, 10√2 b. 8, 16, 16√3 c. 12, 24√3, 24 d. 8, 16, 8√3

Two angles in a triangle measure (2.3x +25)° and (5.8x +11)°. What is the value of x if the two angles are congruent to one another? A. x = 34.2 B. x = 10.3 C. x = 6.6 D. x = 4

P = conv{±e₁±e2, 2e₂}⊂CR² (a) Draw P and PT, the polar of P. (b) Write the polar P of P as convex hull of their vertexes. (c) Write P as polyhedron.

A right circular cylinder is circumscribed about a sphere whose radius is 3 inches. The number of cubic inches in the volume of the cylinder is A) 108p B) 18p C) 54p D) 36p

Which answer would make ΔBCD- ΔLMN? m∠B = m∠L and m∠D = m∠N BC/CD=DL/LM=LM/MD m∠B=m∠C and m∠L = m∠M m∠B+m∠C+m∠D = 180°

ABCD is a quadrilateral where AB = AD = 5 m, BC = CD = 7 m and the angle DAB = 80. Calculate the length of AC.

Find the exact value of each expression. (a) sin 40° cos 20° + cos 40° sin 20° (b)sin 105° (c)sin7π/12

(1 point) Let a be an angle, with 0 < a < 2π. Given cos(2a) and 3π/2 <2a < 27, find exact values of the six trigonometric functions. Note: You are not allowed to use decimals in your answer. sin(a) = cos(a) = tan(a) = csc (a) = sec (a) = cot(a) =

In ∆PQR, p = 36 cm, q = 21 cm and r=17 cm. Find the measure of ∠Q to the nearest 10th of a degree.

Find the final hourly wage if a $19.50 starting wage is increased by 2.5% each year for 7 years. The final hourly wage is $ Round your answer to the nearest cent.

In right triangle ABC, mZC = 90°. If cos B = equals? 13 (1) tan A (2) tan B (3) sin A (4) sin B 5 13' which function also

The image of ΔDEF is ΔD'E'F'. Under which transformation will the triangles not be congruent? (1) a reflection through the origin (2) a reflection over the line y = x (3) a dilation with a scale factor of 1 (4) a dilation with a scale factor of centered at (2,3) centered at the origin

Triangle A'B'C' is the image of ΔABC after a dilation followed by a translation. Which statement(s) would always be true with respect to this sequence of transformations? I. ΔABCΔA'B'C' II. ΔABCΔA'B'C' III. AB || A'B' IV. AA'= BB' (1) II, only (2) I and II (3) II and III (4) II, III, and IV

Solve: 8r+ 4 = 6. Write your answer as an integer, proper fraction, or mixed number in simplest form. r=_________

Find the similarity ratio and the rati of perimeters for two reguloctagons with areas of 18 in. 2 and50 in2 03:5; 9:25 03:5; 3:5 09:25; 9:25 09:25; 3:5

Solve ΔABC subject to the given conditions. A = 10.4°, C = 98.2°, b = 58

Solve the following equation. Write your answer as an integer, proper fraction, or mixed number in simplest form. 4q+ 11 10 =3

In a triangle ABC with circumcenter "O" and orthocenter "H", AC-24μ and OB=13μ. Calculate BH.

A triangle has sides of lengths 27,79, and 84. Is it a right triangle? Explain. O no; 27² + 79² = 84² 0yes; 27² +79² 84² O no: 272+79284² O yes; 27² +79² # 84²

Let ABC be a triangle with AB<AC. Denote E the foot of the B-angle bisector, F the foot of the C-angle bisector, and P the intersection of EF and BC. If PB=13 and BC=6, find AB/AC.

A decorative copper piece in the shape of a regular pyramid, with an equilateral triangle base, is shown in the figure below. The lateral faces and the base are covered with sheet copper. Compute the total number of square feet of copper contained in the piece. Round your answer to the 3 significant digits. 9.50 in. a. 1.49 sq ft b.0.886 sq ft c. 1.28 sq ft d. 0.827 sq ft 7.30 in.

Given AQRS = ATUV,QS = 3v + 2, and TV = 7v6, find the length of QS and TV. 08 02 O 20 09

C. Directions: Complete the two-column proof. (10-15)Given: A LMN where IM <LN < MN Prove: MN+ IN > LM; MN + LM > LN; LM + IN > MN

Jay, Kay, and Ray found themselves far apart when they stopped forlunch while working in a field. Jaycould see Kay, then turn through 73°and see Ray. Kay could see Ray, then turn through 53° and see Jay. Raycould see Jay, then turn through 54° and see Kay. Which two were farthest apart? Kay and Ray Ray and Jay Jay and Kay Kay and Ray were the same distance apart as Ray and Jay.

Two sides of a triangle have lengths10 and 15. What must be true about the length of the third side? O less than 10 O less than 5 O less than 15 O less than 25