Math Is Fun Forum

owenflo

Member

Registered: 2014-07-21

Posts: 115

SUPPLEMENTARY and COMPLEMENTARY ANGLES

1. 87

A77
B24
C93
D47
E 31
F 48

2. 160

A10
B20
C30
D40
E 50
F 60

3. 68

A851
B295
C302
D574
E 112
F 638

4. 174

A3
B4
C5
D 6
E 7
F 8

5. a

A180-a
B180/2
C 179*a
D 179+a
E 60
F pi

Find the complementary angles of the following.

6. 53

A90
B32
C 25
D 45
E 18
F 37

7. 12

A46
B78
C98
D31
E 52
F 64

8. 73.5

A16.5
B34.2
C29.4
D17.7
E 57.9
F 11.3

9. 23.7

A66.3
B70.1
C42.5
D83.9
E 54.8
F 36.2

10. a

A90/a
Ba-90
Ca/2
D90-a
E 90-2
F a^2

Two of the angles are listed. Find the measure of the third angle in each triangle. Similar to example 6

11. 16,42

A256
B421
C107
D510
E 122
F 329

12. 90, 30

A23
B42
C47
D60
E 71
F 89

13. 43, 118

A12
B34
C19
D57
E 11
F 27

14. 60, 60

A15
B90
C29
D60
E 30
F 45

15. 14, 123

A73
B25
C38
D19
E 43
F 13

16. 68, 86

A45
B56
C26
D19
E 32
F 82

17. 55, 77

A18
B37
C62
D57
E 20
F 48

18. a, (a + 80)

A100 - 2a
B112 - 7a
C182 - 2a
D254 - 5a
E 311 - 3a
F 302 - 1a

19. x, (x + 20)

A189 - 7x
B167 - 1x
C114 - 5x
D160 - 2x
E 124 - 2x
F 142 - 1x

20. m, 2m

A172 - 2m
B187 - 7m
C124 - 4m
D143 - 1m
E 164 - 9m
F 180 - 3m

1. C
2. B
3. E
4. D
5. D
6. F
7. B
8. A
9. A
10. B
11. D
12. A
13. D
14. B
15. A
16. C
17. F
18. A
19. D
20. F

Please help me check and if i get them wrong please help me!

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: SUPPLEMENTARY and COMPLEMENTARY ANGLES

Check 11 right away. I am not saying that is the only, but it does jump right out at you.

Are the first part of the question, 1 - 5 supplementary?

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: SUPPLEMENTARY and COMPLEMENTARY ANGLES

question 11. B??

Question 11.. 122 E!
because 180-58=122

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: SUPPLEMENTARY and COMPLEMENTARY ANGLES

Question 12, I got D 60

Question 13, C 90.
Question 14, D 60.
Q15, E 43.

Just realized how to do it the RIGHT way haha, please check to be sure they are correct please! thanks

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: SUPPLEMENTARY and COMPLEMENTARY ANGLES

How do you do Question 10?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: SUPPLEMENTARY and COMPLEMENTARY ANGLES

11. 16,42

A256
B421
C107
D510
E 122
F 329

B for 11 is not correct. The sum of the angles of a triangle is 180 degrees.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: SUPPLEMENTARY and COMPLEMENTARY ANGLES

It's E... I corrected myself

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: SUPPLEMENTARY and COMPLEMENTARY ANGLES

How do you do Question 10?

10) a

A90/a
Ba-90
Ca/2
D90-a
E 90-2
F a^2

D) 90 - a, do you see why?

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: SUPPLEMENTARY and COMPLEMENTARY ANGLES

How did you get D for 10..?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: SUPPLEMENTARY and COMPLEMENTARY ANGLES

Two angles are called complementary if they add up to 90 degrees.

http://www.mathsisfun.com/geometry/comp … ngles.html

So let us call the second angle b. From the definition we know that a + b = 90. Understand so far?

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.