1.
What is the perimeter of a rectangle with legnth 13 and width 10.
Correct Answer
C. 46 units
Explanation
the perimeter is the addition of all the sides. 13+13+10+10=46
2.
Find the Area of a rectangle with sides 13 inches and 10 inches
Correct Answer
B. 130 square units
Explanation
the area of a rectangle is legnth X width. 13 X 10= 130
3.
The area of a trapezoid base 1= 12, base 2= 15, height= 4 is?
Correct Answer
D. 54 square units
Explanation
the area formula for a trapezoid = 1/2H(b1+b2)
4.
The area formula for a rhombus is
Correct Answer
C. 1/2D1D2
Explanation
d1 & d2 are diagonals
5.
The approximate area of a circle with radius 20 is?
Correct Answer
A. 1256 square units
Explanation
area formula for a circle = pi*r*r
6.
The area for a Regular Polygon = 1/2 P*A. What do P and A stand for
Correct Answer
Perimeter, Apothem
Explanation
The formula for finding the area of a regular polygon is given as 1/2 P*A, where P represents the perimeter of the polygon and A represents the apothem. The perimeter is the total length of all the sides of the polygon, while the apothem is the distance from the center of the polygon to any of its sides. Therefore, in order to calculate the area of a regular polygon, you need to know both the perimeter and the apothem.
7.
Surface Area is found by:
Correct Answer
B. Adding the area of all the sides together
Explanation
remeber our jigsaw lesson.
8.
Given a cylinder with a radius of 5 and a hight of seven, what is the surface area?
Correct Answer
C. 376.8 units squared
Explanation
circumfrence* hight + circle on top+ circle on bottom=
31.4*7 + 78.5 + 78.5
9.
FInd the lateral area of a right cylinder
Correct Answer
A. 219.8 units squared
Explanation
lateral area does not include the top and bottom, just the area around.
10.
Find the Total Surface area of a regular prism with a lateral area of 20 and a base of 14.
Correct Answer
B. 48 units squared
Explanation
lateral area plus the two bases will give the total surface area
11.
The formula for the surface area of a pyramid is
Correct Answer
A. 1/2 Perimeter* Legnth+ Base
Explanation
The correct answer is 1/2 Perimeter* Length + Base. This formula is used to calculate the surface area of a pyramid. It takes into account the perimeter of the base, the length of the slant height, and the area of the base. By multiplying the perimeter by half the length and adding the base area, we can determine the total surface area of the pyramid.
12.
The lateral area od a prism is found by multiplying the height by the ______________.
Correct Answer
perimeter
Explanation
The lateral area of a prism is found by multiplying the height by the perimeter. This is because the lateral area represents the total surface area of the sides of the prism, which can be calculated by multiplying the height of the prism by the distance around the base, which is the perimeter.
13.
Find the surface area ofa pyramid with a square base legnth 10 and a slant height of 13
Correct Answer
D. 340 units squared
Explanation
special right triangle to find height of 12. 5*12*(.5)=30 for each right triangle, 60 for each side. 4 sides since its a square so 60+60+60+60+ base. Base =10*10 so 240+100.
14.
Find the total Surface area of a cone with radius 3, slant height of 5.
Correct Answer
D. 122.46 units squared
Explanation
circumfrence* slant legnth + base
15.
Look at number 32 a in your book on page 605. Determine the surface area of the Frustrum with base 4yards, slant height 4 yards, height of 3 yards and a top of 2 yards.
Correct Answer
C. 56 units squared
Explanation
this is 4 trapezoids and 2 squares. top= 4, bottom= 16, the area of each face is 1/2H(b1+b2)= 1/2*3*(2+4)=9 9*4=36
36+4+16=56