CPM Homework Help : CC2 Problem 1-11

Find the perimeter and area of each figure below. Review the Math Notes box in this lesson for help. Be sure to include the correct units in your answers.

Step 1 (a):
To find the perimeter, add together all of the lengths of the outside edges.
Step 2 (a):
The area of a triangle is:
$\frac {1}{2} \times \text{ base}\times \text{ height}$
Answer (a):
Perimeter: $18.5$ inches
Area: $15$ square inches

Hint (b):
Look back at the Math Notes boxes.

Can you find the top and bottom "bases" of the trapezoid?
Can you find the height of the trapezoid?
More Help (b):
$\text{Area of a trapezoid}=$
$\frac{(\text{top}+\text{bottom})}{2}\times\text{height}$
$\text{Perimeter} = \text{Sum of all side lengths}$
Answer (b):
Perimeter: $61.4$ cm
Area: $210$ square cm

Hint (c):
Look back at the Math Notes.
What is the base?
What is the height?
More Help (c):
$\text{Area of a parallelogram}=\text{base}\times \text{height}$
Answer (c):
Perimeter: $22$ yards
Area: $21$ square yards