Question

if the measures of sides are 2.5 and 2.5 cm and measures of angles are 40 degree 70 degree then what type of triangle​

Answer 1

Answer:

In ΔPQR,

∠P + ∠Q + ∠R = 180∘ (Angle sum property)

⇒ 70∘ + 65∘ + ∠R = 180∘

⇒ 135∘ + ∠R = 180∘

⇒ ∠R = 180∘ − 135∘

= 45∘

Hence, the measure of ∠R is 45∘.