Geometry MATHS - Geometry

In Fig. $AB = BC$ and $AD = BD = DC.$
The number of isoscles triangles in the figure is:

• A
  $1$
• B
  $2$
• ✓
  $3$
• D
  $4$

Answer: C.

In Fig. $\angle\text{BAC}-90^\circ$ and $\text{AD}\perp\text{BC}.$ The number of right triangles in the figure is:

• A
  $1$
• B
  $2$
• ✓
  $3$
• D
  $4$

Answer: C.

In Fig. $\text{PQ}\perp\text{RQ},\text{PQ}=5\text{cm}$ and $\text{QR}=5\text{cm}.$ Then $\triangle\text{PQR}$ is:

• A
  A right triangle but not isosceles.
• ✓
  An isosceles right triangle.
• C
  Isosceles but not a right triangle.
• D
  Neither isosceles nor right triangle.

Answer: B.