Given measurements of ∆STU are ST = 6 cm, SU = 7 cm and ∠T = 80°.

Steps of Construction:
1. Draw a rough sketch of triangle and label it with given measurements.
2. Draw a line segment with ST = 6 cm.
3. Draw a ray TX such that ∠STX = 80°.
4. Draw an arc with centre S and radius 7 cm to intersect TX at point U.
5. Join SU.
Hence, required triangle ∆STU is constructed with the given measurements.