To be able to fine one of the bases we must first find the vertex and to do that we have to find the value of a.
A triangle measures 180 degrees.
Therefore we must form an equation that is equal to 180 degrees.
(a + 30) + 2(2a - 15) = 180
We put 2 in front of (2a - 15) because there are two base angles.
Solution:
(a + 30) + 2(2a - 15) = 180
a + 30 + 4a - 30 = 180
a + 4a + 30 - 30 = 180
5a = 180
5a/5 = 190/5
a = 36 degrees
Therefore the base = 2(36) - 15 = 57 deg
Centimeter because millimeter is way to small and meter and kilometer are far to big
Answer:
Step-by-step explanation:
f(x) = (x - 4)(x + 2)
f(x) = x^2 + 2x - 4x - 8
f(x) = x^2 - 2x - 8
Answer:
122
Step-by-step explanation:
<HEB=180-(42+32)
=180-74
=106
<DEA=180-106 (straight line)
=74
<NAD=48+74(exterior angle = sum of 2 interior opposite angles)
<NAD=122