Test 10, Unit 12

Question 1

Formula for area of a triangle

Answer 1

A = 1/2bh

Question 2

Formula for perimeter of a square

Answer 2

P = 4s

Question 3

Formula for circumference of a circle using the radius

Answer 3

C = 2 pi r

Question 4

Formula for perimeter of a rectangle

Answer 4

P = 2l + 2w

Question 5

Formula for area of a circle

Answer 5

A = pi r squared

Question 6

Formula for area of a trapezoid

Answer 6

A = h(b1 + b2) divided by 2

Question 7

Formula for area of a square

Answer 7

A = s x s or A = s squared

Question 8

Formula for area of a parallelogram

Answer 8

A = bh

Question 9

type of angle - 90 degrees

Answer 9

right

Question 10

type of angle - less than 90 degrees

Answer 10

acute

Question 11

type of angle - more than 90 degrees but less than 180 degrees

Answer 11

obtuse

Question 12

type of angle - 180 degrees

Answer 12

straight

Question 13

type of triangle - three congruent sides

Answer 13

equilateral

Question 14

type of triangle - only two congruent sides

Answer 14

isosceles

Question 15

type of triangle - one right angle

Answer 15

right

Question 16

write the number of degrees in a triangle

Answer 16

180

Question 17

write the name of the instrument that is used to draw circles

Answer 17

compass

Question 18

write the length of the radius in a circle if the diameter is 12 cm

Answer 18

6 cm

Question 19

write the name of the polygon that has six sides.

Answer 19

hexagon

Question 20

Find the perimeter of a square - s = 50 cm

Answer 20

P = s x 4
P = 50 x 4
P = 200 cm

Question 21

Find the perimeter of a rectangle - l = 9 1/2 ft.; w = 7 ft.

Answer 21

P = 2l + 2w
P = 19 + 14
P = 33 ft.

Question 22

Find the perimeter of a parallelogram - l = 38 yd.; w = 35 yd.

Answer 22

P = 2(l + w)   or P = 2l + 2w (same thing)
P = 2 (38 + 35)
P = 2 (73)
P = 146 yd.

Question 23

Find the area of a circle - r = 4 cm

Answer 23

A = pi r squared
A = 3.14 x 16
A = 50.24 sq. cm

Question 24

Find the area of a rectangle - l = 15.2 m; w = 12.1 m

Answer 24

A = lw
A = 15.2 x 12.1
A = 183.92 sq. m

Question 25

Find the area of a triangle - b = 8 ft.; h = 6 ft.

Answer 25

``` A = 1/2bh A = 1/2 x 48 A = 24 sq. ft. ```

Question 26

Find the area of a square - s = 25 ft.

Answer 26

``` A = s x s A = 25 x 25 A = 625 sq. ft. ```

Question 27

Find the area of a trapezoid - b1 = 10 in.; b2 = 8 in.; h = 6 in.

Answer 27

``` A = h(b1 + b2) divided by 2 A = 6(18) divided by 2 A = 108 / 2 A = 54 sq. in. ```

Question 28

Find the area of a parallelogram - b = 20 ft.; h = 18 ft.

Answer 28

``` A = bh A = 20 x 18 A = 360 sq. ft. ```

Question 29

Find the area of a circle - r = 10 m

Answer 29

``` A = pi r squared A = 3.14 x 10 x 10 A = 314 sq. m ```

Question 30

Find the circumference. d = 8 in.

Answer 30

``` C = pid C = 3.14 x 8 C = 25.12 in. ```

Question 31

Find the circumference. r = 10 m

Answer 31

``` C = 2pir C = 2 x 3.14 x 10 C = 62.8 m ```

Question 32

Find the number of degrees in the 3rd angle of the triangle: 80 degrees, 22 degrees

Answer 32

180 - 80 - 22 = | 78 degrees

Question 33

Find the number of degrees in the 3rd angle of the triangle: 55 degrees, 64 degrees

Answer 33

180 - 55 - 64 = | 61 degrees

Question 34

Find the number of degrees in the 3rd angle of the triangle: 90 degrees, 30 degrees

Answer 34

180 - 90 - 30 = | 60 degrees

Question 35

Write an equation & solve. | One angle is twice another angle. The sum of the angles is 90. How many degrees are in each angle?

Answer 35

x + 2x = 90 3x = 90 x = 30 the two angles are 30 & 60

Question 36

Write an equation & solve. | One angle has 10 degrees more than another angle. The sum of the angles is 90. How many degrees are in each angle?

Answer 36

``` x + x + 10 = 90 2x + 10 = 90 2x = 80 x = 40 the two angles are 40 & 50 ```