Question

What is the perimeter of ΔGHI?

Answer 1

Answer: 12 units

Step-by-step explanation

Based on the diagram we can see that:

• GI = 3
• IH = 4

Count out the number of spaces, or subtract coordinates to determine those lengths. Then use the pythagorean theorem
`a^2+b^2 = c^2` to determine the hypotenuse is 5 units long.

Triangle GHI is a 3-4-5 right triangle.

Add up the exterior sides to get the perimeter.

3+4+5 = 12 units is the perimeter