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Math 7 Homework 4/12/2016 (even only)
Name
LESSON
Date
10.1 Practice A
For use with pages 537–541
Find the value of x. Then classify the triangle by its angle measures, acute,
obtuse, or right.
1.
2.
51
3x Lesson 10.1
x
3.
2x 102
x
4.
3x x 3x 102 180
x
60
3x 34
(x 6)
5. The perimeter of an equilateral triangle is 45 meters. Find the length of
each side.
6. The perimeter of an isosceles triangle is 34 feet. The length of one side is
14 feet. The lengths of the other two sides are equal. Find the lengths of the
other two sides.
Find the unknown side length of the triangle given the perimeter P. Then
classify the triangle by its side lengths.
7. P 48 in.
8. P 65 yd
9. P 36 cm
25 yd
18 in.
x
30 yd
10. The ratio of the side lengths of a triangle is 6 : 9 : 11. The perimeter of the
triangle is 104 inches. Find the side lengths. Then classify the triangle by
its side lengths.
,
,
;
11. The perimeter of a triangular window is 88
inches. The ratio of the side lengths of the
window is 16 : 16 : 12. Draw and label a diagram
of the window. What are the side lengths of the
window? Classify the window by its side
lengths.
122
Pre-Algebra
IDEA! Works
equilateral triangle —
3 congruent sides
isosceles triangle —
at least 2 congruent sides
scalene triangle —
no congruent sides
Copyright © Holt McDougal Math.
All rights reserved.
Answers
Lesson 9.8
9. regular octagon; convex
8.
Practice A
5
12
5
1. sin A 1
; cos A 13 ; sin B 13 ;
3
12
4
cos B 13
3
4
7
24
cos T 5 sin N 25 ; cos N 25
4. 0.3256
5. 0.2924
7. 0.9744
11. 94.4
3
6. 0.9962
8. 0.9986
12. 35.0
3. 0.5
9. 8.5
10. 13.4
13. 59 m
2. 65
1
3. 2, 2
6. x 12; y 122
7. x 83
; y 16
10. 33.4 ft
Standardized Test A, Chapter 9
1. A
2. C
3. B
4. A
5. B
6. B
7. C
8. A
9. C
10. C
12. A
5. 147 ft2
6. 15 m
8. 24 mm
9. 21 cm
32(tan 12°) 6.8 15. 4
11. B
x
32
16. 60
Chapter 10
4. 108 yd2
7. 6 ft
10. 61 ft2
shade: 60 in.2; large style-B shade: 352 in.2;
small style-B shade: 80 in.2 2. large style-B
shade; 88 in.2 3. large frame: 48 in.;
5. $.90
small frame: 24 in. 4. $3
Practice A
1. 41 in.
2. 138 m
Lesson 10.1
3. 151 ft
5. 7 ft, 14 ft
6. 11 m, 22 m
8. 380 mm2
9. 154 ft2
11. 35 m, 70 m
4. 377 yd
7. 254 cm2
10. 2462 m2
12. 29 ft, 58 ft
13. 38 ft
2
14. 1451 m
Practice A
Quiz 1
1. 43; acute
2. 19.5; obtuse
3. 20; acute
or equiangular 4. 70; acute
5. 15 m
6. 10 ft
7. 15 in.; isosceles 8. 10 yd;
scalene 9. 12 cm; equilateral
10. 24 in., 36 in., 44 in.; scalene
11.
; isosceles
32 in.
3. 18 cm2
Lesson 10.4
14. 6.8 feet; tan 12° ;
13. A
2. 30 ft2
1. large style-A shade: 264 in.2; small style-A
5. 2
9. 9.7
1. 32 m2
Problem Solving Workshop
3
4. 2, 2
8. 8.0
7
Lesson 10.3
Practice A
Quiz 2
1. 5
square
2. sin S 5; cos S 5; sin T 5;
32 in.
1. 6 m, 6 m, 9 m
3. rhombus; 72
6. 324 m2
2. 30, 60, 90; right triangle
4. 28 in.2
7. 9 cm
8. 6 ft
5. 616 yd2
9. 42 mm
Lesson 10.5
Practice A
1.
24 in.
7 cm
Lesson 10.2
5 cm
7 cm
Practice A
1. 12-gon; concave
3. parallelogram
6. 5
A18
2. octagon; convex
4. trapezoid
7. 42
Pre-Algebra
IDEA! Works
5. rectangle
5 cm
13 cm
382 cm2
Copyright © Holt McDougal Math.
All rights reserved.
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