Fh is an angle bisector of the given isosceles triangle, what is the measure of ∠a if ∠c = 55°?
a) 35°
b) 55°
c) 70°
d) 105°

2)
if 2a = 80 and b = c, what is the measure of ∠b?
a) 40°
b) 50°
c) 80°
d) 100°

Part 1) Option A.

Part 2) Option B.

Step-by-step explanation:

we know that

An isosceles triangle has two equal sides and two equal angles

Part 1) what is the measure of ∠a?

we know that

----> equation A

Remember that the sum of the interior angles of triangle is equal to 180 degrees

we have

----> equation B

substitute equation A in equation B

Divide by 2 both sides

we have

---> given problem

substitute

Part b) we have that

we have

---> given problem

---> equation A

Remember that the sum of the interior angles of triangle is equal to 180 degrees

we have

----> equation B

substitute equation A in equation B

we have

substitute

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation: