1. QQ: 80 39 Is this a right triangle?
Find the length of the diagonal of this rectangle.
The Pythagorean Theorem works
both ways! If a triangle is a right
triangle, then ______________________________________.
If _______________________________, then the triangle is a right triangle. 80 39 89

2. Did you bring in your community supplies yet?

4. Today’s Objective:
I can use the Pythagorean Theorem to solve problems.

5. Find the perimeter and area of the green triangle.

6. A𝐫𝐞𝐚= 𝟏 𝟐 bh
1- base and height must be perpendicular
A = 𝟏 𝟐 (𝟓)(𝟒)
A = 10

7. Perimeter: the distance around the sides
1- Notice the sides are part of a right triangle.
2- use Pythagorean Theorem to find the black sides
4.47 5
3-Add the sides:
= 14.47 5

8. Questions?????? Homework is due Monday…

9. Carlos leaves school to go home
Carlos leaves school to go home. He walks 6 blocks North and then 8 blocks West. How far is Carlos from the school? 8 6 ?
Solve using the Pythagorean theorem.

10. Finding distances using the Pythagorean Theorem:
(6,4)
(-3, -4)

11. Triangles: