The sign measures 18 inches across in diameter. Which measurement is closest to the area of the sign in square inches?
Two-Dimensional Geometry

Quiz
•
Mathematics
•
7th Grade
•
Hard
Anthony Clark
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Answer explanation
The formula to find the area of a circle is pi times radius squared. We must first find the radius by dividing the diameter by 2. Then we need to multiply the radius times itself, then times 3.14.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A triangle is inscribed in a rectangle, as shown below. What is the area of the shaded region?
Answer explanation
First find the area of the triangle by multiplying the base and height then dividing by 2. Next, find the area of the rectangle by multiplying the base and height. Because are two shapes are different colors, you then need to subtract the two areas to find your answer.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Using various puzzle pieces, Marco forms the figure pictured. What is the best estimate of the area of the figure?
Answer explanation
First find the area of the semicircle. The diameter is 8 so we need to cut that in half to find a radius of 4. Then we multiply the radius by itself and then times 3.14. From there we must divide by 2 since it is a half circle. For the triangle, we must subtract 4 from the base since 16 measures the base and the radius of the circle. Then multiply that by the height and then divide by 2. Finally, we must add our two areas together since the two shapes are the same color.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A puzzle is shown below. Which of the following is the closest to the area of the shaded portions of the puzzle?
Answer explanation
The shape of the shaded region is a parallelogram. To find the area of a parallelogram, we just multiply base times height. Each square is 2 cm and the base is a total of 5 squares and the height is a total of 3.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following equations can be used to find the missing angle, x, in the triangle below?
x + 84 = 180
x + 84 = 360
x + 42 = 90
x + 42 =180
Answer explanation
The three angles of a triangle must add up to 180. To write an equation, you just add the three angles given and make it equal to 180.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Janice is painting a portion of a gymnasium court. If Janice paints the shaded area, then how many square feet will she paint?
Answer explanation
First, find the area of the rectangle by multiplying the base and height. Next, we have two semicircles which will make one whole circle. To find the area of the circle, we must first divide the diameter by 2 to find the radius, then multiply the radius by itself and that answer by pi (3.14). Then, since the shapes are different colors, we will subtract the two areas to find the area of the shaded region.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Angle ABC and angle CBD are complementary. What is the value of x?
64 degrees
52 degrees
90 degrees
26 degrees
Answer explanation
Complementary angles add up to 90 degrees. If one angle is 38 degrees, subtract that from 90 to find the degree of the other angle. That angle is equal to 2x, so divide the degrees by 2 to find the value of x.
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