(Due in 20 minutes) The three side lengths of four triangles are given. Which triangle is a right triangle?

Triangle 1: √13, 6, 7

Triangle 2: 7, 8, 13

Triangle 3: 10, 11, 12

Triangle 4: √10, 9, 8

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.

i believe the answer is c.

c > -10.55

step-by-step explanation: