Aball is thrown into the air with an upward velocity of 48 ft/s. its height h in feet after t seconds is given by the function h = –16t2 + 48t + 8. a. in how many seconds does the ball reach its maximum height? round to the nearest hundredth if necessary. b. what is the ball’s maximum height?

Consider the triangle ABC in the attached file.

Given: An isosceles triangle ABC.  

To Prove: Base angles of an isosceles triangle are congruent.

Construction: Draw AM perpendicular to BC.

Proof: To prove the base angles  of an isosceles triangle are congruent, we first need to prove triangle ABM is congruent to triangle ACM.

In and

So, by AAS criteria.

Therefore,   by CPCT.

Hence, the base angles of an isosceles triangle are congruent.