Question

A $\Delta ABC$ with AB = 6 cm, $\angle A={30}^{\circ }$ and $\angle B={60}^{\circ }$ is given. Another $\Delta A{B}^{\prime }{C}^{\prime }$ similar to $\Delta ABC$ with AB' = 8 cm is constructed as shown below:

The reason why we don't construct a ray making an acute angle at A is

• A. $\Delta ABC$ is a right-angled triangle.
• B. Length of AB' is given.
• C. Scale is not given.
• D. $\angle A={30}^{\circ }$

Answer 1

The correct option is B Length of AB' is given.

As the length AB' is given, we can construct B'C' by using corresponding angle. Hence, we don't require to construct a ray making an acute angle at A.