Answer:
measure of angle A is 80 degree.
Step-by-step explanation:
isosceles triangle will have same base angles
first base angle is 50, and the second will also be 50
3 angles of a triangle will add up to be 180 degree.
A is the vertex angle.
So 50 + 50 + A = 180
100 + A = 180
A = 80.
A suitable calculator can row-reduce the augmented matrix.
first number: 3
second number: 1
third number: 8
36/11
Calculator solves everything
Answer:
2.9
just answering wrong because i need points sorry