C) 130° A) 80° 3) In the adjoining figure, measures of angles < BAC and ACD are indicated. Calculate the measures of the remaining angles. Is A ABC isosceles? Give reason.
Answers
Answered by
2
Answer:
An exterior angle of a triangle is equal to the sum of the opposite interior angles.
Hence, In this case ∠A and ∠B
So,
∠A+∠B=140
∘
as ∠A=∠B
or,2∠A=140
∘
∠A=∠B=70
∘
Answered by
2
Answer:
BAC = 80
ACD = 130
ACB+ACD=180 [Linear Pair]
ACB+130=180
ACB=180-130
ACB=50
Sum of interior angles of a triangle is 180
BAC+ACB+ABC=180
80+50+ABC=180
130+ABC=180
ABC=180-130
ABC=50
Yes triangle ABC is isosceles because angle ABC=ACB=50
Step-by-step explanation:
can't see. the figure
Similar questions