Question

Find the area of triangle ABC

Answer 1

In triangle ABC , <A = 70°....given

<C = 70° .........{side opposite to congruent angle is congruent}

< B = 40°

construction: draw a perpendicular height BD.

tan70° = height = 2.74mm

Area of triangle ABC = 1/2 b × h

= 1/2 × 2.74 × 10

= 13.7mm²

Area of triangle ABC = 13.7mm²✅