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Mrs. Rivas International Studies Charter School. Worksheet Practice 10-7. Find the area of each triangle. Round your answers to the nearest tenth. 1). Mrs. Rivas International Studies Charter School. Worksheet Practice 10-7.

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Worksheet Practice 10-7

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Mrs. Rivas

International Studies Charter School

Worksheet Practice 10-7

Find the area of each triangle. Round your answers to the nearest tenth.

1)

Mrs. Rivas

International Studies Charter School

Worksheet Practice 10-7

Find the area of each triangle. Round your answers to the nearest tenth.

2)

Mrs. Rivas

International Studies Charter School

Worksheet Practice 10-7

Find the perimeter and area of each regular polygon to the nearest tenth.

3)

Mrs. Rivas

International Studies Charter School

Worksheet Practice 10-7

Find the perimeter and area of each regular polygon to the nearest tenth.

4)

Mrs. Rivas

International Studies Charter School

Worksheet Practice 10-7

Find the perimeter and area of each regular polygon to the nearest tenth.

5)

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

6)

10a – 4 + 8a + 6 + 6a – 2 = 360

10a – 4 + 8a + 6 + 6a – 2 = 360

24a = 360

a =

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

7)

L of Arc = mArcº C

L of Arc = mArcº 2r

L of Arc = 20º 2(9)

mArcº = 20º

360º

360º

360º

r = 9 in.

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

8)

L of Arc = mArcº C

L of Arc = mArcº d

L of Arc = 120º (15)

360º

360º

360º

mArcº = 120º

d = 15 ft

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

9)

L of Arc = mArcº C

L of Arc = mArcº d

L of Arc = 180º (22)

360º

360º

360º

mArcº = 180º

d = 22 m

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

10)

Monster truck

Motorcycle

C = d

C = d

C = (66)

C = (25)

C = 207.24

C = 78.5

207.24 – 78.5 =

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

11)

A = r²

C = (8)(8)

C =

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

12)

A = r²

C = (0.1)(0.1)

C = 0.01

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

13)

A of Sec.= mArcº r²

A of Sec.= 45º (10)(10)

mArcº = 45º

360º

360º

r = 10 in.

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

14)

A of Sec.= mArcº r²

A of Sec.=300º (6)(6)

mArcº = 300º

360º

360º

r = 6 ft

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

15)

A of Sec.= mArcº r²

A of Sec.=300º (12)(12)

mArcº = 300º

360º

360º

r = 12 m

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

16)

3

= 2

2s

120º

60º

s

30º

A of  = 1.7320

A Sec.= 4.1866

s3

A of  = 1(2¯)(1)

A Sec.= 120º (2)(2)

A of  = 1bh

A Sec.= mArcº r²

4.1866 – 1.7320 = 2.4546

2

2

360º

360º

mArcº = 120º

r = 2 m

b =

2¯

3

h =

1

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

17)

3

A of  = 27.7128

A Sec.= 33.4933

A of  = 1(8)(4¯)

A Sec.= 60º (8)(8)

A of  = 1bh

A Sec.= mArcº r²

33.4933 – 27.7128 = 5.7805

2

2

360º

360º

mArcº = 60º

r = 8 in.

b =

8

3

h =

4¯

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

18)

A of  = 50

A Sec.= 78.5

A of  = 1(10)(10)

A of  = 1bh

A Sec.= 90º (10)(10)

A Sec.= mArcº r²

78.5 – 50 = 28.5

2

2

360º

360º

mArcº = 90º

r = 10 cm

b =

10

10

h =

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

19)

A of  = 72

A Sec.= 108

A of  = 1(12)(12)

A Sec.= 270º (12)(12)

A of  = 1bh

A Sec.= mArcº r²

2

2

360º

360º

mArcº = 270º

r = 12 cm

b =

12

12

h =

Mrs. Rivas

Ida S. Baker H.S.

Worksheet Practice 10-7 and 12-3

A = bh - A = r²

20)

A = (6)(6) - A = (3)(3)