##### 1. Which of the following letters represents the vertex in the following picture?

- D and E
- E and H
- F and G
- G only
- H only

##### 2. If a circle has the diameter of 8, what is the circumference?

- 6.28
- 12.56
- 25.13
- 50.24
- 100.48

##### 3. What is the area of the triangle below?

- 22 cm
^{2} - 33 cm
^{2} - 44 cm
^{2} - 50 cm
^{2} - 66 cm
^{2}

##### 4. What is the measure of the solid line angle depicted by the following figure?

- 90 degrees
- 180 degrees
- 225 degrees
- 270 degrees
- 0 degrees

##### 5. What is the measure of angle B in the following figure if angle A measures 135°?

- 40°
- 45°
- 50°
- 135°
- 225°

##### Answers & Explanations

###### 1. E

The vertex is the point, formed by the two rays of an angle. Thus, H is the vertex of the angle.

###### 2. C

C=*πd*. Substituting 8 for *d* gives C=8π, where C is approximately 25.13.

###### 3. B

The area of a triangle may be found by using the formula, A=1/2*bh*, where *b* represents the base and *h*represents the height. Thus, the area may be written as *A*=1/2(11)(6), or A = 33. The area of the triangle is 33 cm’.

###### 4. D

The sum of the angles, formed by the perpendicular rays is 360°, thus the curved arrow represents an angle measure that is equal to the difference of 360° and 90°, or 270°.

###### 5. B

Since angles A and B are supplementary, the measure of angle B is equal to the difference of 180° and 135°, or 45°.