Question

finding the area of a triangle

estimate. circle all problems that will have areas gr

then find the exact areas of only the problems you

Explanation:

Step1: Recall area formula

The area formula for a triangle is $A=\frac{1}{2}bh$, where $b$ is the base and $h$ is the height.

Step2: For problem 1

Count the base and height on the grid. Assume each square has side - length 1 unit. The base $b = 10$ units and the height $h=6$ units. Then $A_1=\frac{1}{2}\times10\times6 = 30$ square units.

Step3: For problem 3

Count the base and height. The base $b = 8$ units and the height $h = 6$ units. Then $A_3=\frac{1}{2}\times8\times6=24$ square units.

Step4: For problem 5

Count the base and height. The base $b = 10$ units and the height $h = 4$ units. Then $A_5=\frac{1}{2}\times10\times4 = 20$ square units.

Answer:

Problem 1 area: 30 square units
Problem 3 area: 24 square units
Problem 5 area: 20 square units