Question

Solve for x in the diagram
A. 37
B. 14
C. 25
D. 15

Answer 1

15

Explanation:

Using the Pythagorean theorem, or knowing that pythagorean triangles are can be scaled up/down, we know that this triangle is similar to the "3 4 5 egyptian triangle" Therefore x would be 15, as the sides are 3x the sides of the 345 triangle. we can prove this with sqrt(81 + 144) = sqrt(225) = 15

Answer 2

15

Explanation:

Pythagorean Theorem:

12^2+9^2=x^2

144+81=x^2

x=15