Question

Construct an isosceles triangle in which the
length of equal sides is 4.8 cm and the angle
between the equal sides is 80°. Measure the
other two angles.​

Answer 1

as in the isosceles triangle angles opposite to equal sides are also equal.

therefore angle B=angle C=x

angle A+angle B+angle C=180°

80°+x+x=180°

2x=180-80

2x=100

x=50°

angle B=angle C=x=50°