Question

area =
perimeter =
perimeter of each triangle below. include u
8.
9.
area =
perimeter =
11.

Explanation:

Step1: Calculate the area of the first triangle

Use the formula for the area of a triangle $A=\frac{1}{2}bh$, where $b = 4$ ft and $h=5$ ft. So $A=\frac{1}{2}\times4\times5$.
$A = 10$ square - feet

Step2: Calculate the perimeter of the first triangle

The perimeter $P$ of a triangle is the sum of its side - lengths. The side - lengths are 7 ft, 7 ft, and 4 ft. So $P=7 + 7+4$.
$P = 18$ feet

Answer:

Area = 10 square feet
Perimeter = 18 feet