Question

State basic proportionality theorem. Use it to prove the following : If three parallel lines l, m, n are intersected by transversals q and s as shown in the adjoining figure, then AB/BC = DE/EF.

If in two triangles △ DEF and △ PQR, ∠ D = ∠ Q and ∠ R = ∠ E, then which of the following is not true ?

The measurements of △ LMN and △ ABC are shown in the figure given below. The length of side AC is :

In the given figure, in △ ABC, AD ⊥ BC and ∠ BAC = 90°. If BC = 16 cm and DC = 4 cm, then the value of x is :