Construct a triangle ABC in which BC is 8 cm, ∠ B is 70∘ and AB-AC=7.
Steps- -Draw line segment BC=8cm. Draw ray BX which makes an angle 70∘ with BC.
-Cut off line segment BD of length AB-AC=7 on BX. Join CD.
-Draw the perpendicular bisector of CD. Let the perpendicular bisector intersect ray BX at A.
-Angle ABC is the required triangle.