See the image below, hope it helps!
First you need to know that the internal angles of a triangle always equals 180°. Therefore:
15+45= 90°
Then since the angles should equal 180, you do:
180-90=90
So the missing angle equals 90°
A*a + b*b = c*c
9*9 + 12*12 = c*c
81 + 144 = c*c
225 = c*c
✓225 = 15
c = 15
The hypotenuse is 15.
Answer:
D
Step-by-step explanation:
Answer:{ 2x+y=7 x−2y=6
Step-by-step explanation: