Question

Find the perimeter of the right triangle.

A. 21 in
B. 36 in
C. 54 in
D. 31.5 in

Answer 1

Are you familiar with how to find the hypotenuse of a triangle?

Answer 2

sorta

Answer 3

\[C^2 = B^2 + A^2\]
Where C is the hypotenuse and A and B are your legs

Answer 4

\[C^2 = 12^2 + 9^2\]

Answer 5

144+81

Answer 6

Very good
so that leaves us with
\[C^2 = \sqrt{225}\]

Answer 7

Simplify the radical to get C

Answer 8

12 + 9 + C = ?

Answer 9

a^2+b^2=c^2
normally c is the hypotenuse
this is a theorem that you will use over and over- so memorize!
It pertains to right triangles which are always 90 degrees
the interior angles of all triangles always add up to 180 degrees
c=15