Fa is a line, line segment, and a ray

i belive those are the ones that are under 90 degreese.

step-by-step explanation: the answer for wha if rt is 10 centimeters long, and wha is st? it’s 6

m∠a is 90°

m∠b is 40°

h is the x-coordinate of the vertex

step-by-step explanation:

we have

in this function

the point represent the vertex of the function

so

h is the x-coordinate of the vertex

k is the y-coordinate of the vertex