Triangles Maths - Triangles

Choose the correct answer from the given four options: $\text{In }\angle\text{BAC}=90^\circ\text{ and}\text{ AD}\perp\text{BC}.\text{Then,}$Traingles

• A
  $B D \times C D=B C^2$
• B
  $A B \times A C=B C^2$
• ✓
  $B D \times C D=A D^2$
• D
  $A B \times A C=A D^2$

Answer: C.

• A
  $\triangle\text{PQR}\sim\triangle\text{CAB}$
• B
  $\triangle\text{PQR}\sim\triangle\text{ABC}$
• ✓
  $\triangle\text{CBA}\sim\triangle\text{PQR}$
• D
  $\triangle\text{BCA}\sim\triangle\text{PQR}$

Answer: C.

• A
  $ 9\ cm$
• ✓
  $ 10\ cm$
• C
  $ 8\ cm$
• D
  $20\ cm$

Answer: B.

• A
  $PR \times QR=RS^2$
• B
  $QS+RS=QR^2$
• ✓
  $PR+QR=PQ^2$
• D
  $PS+RS=PR^2$

Answer: C.

• A
  BC × EF = AC × FD
• ✓
  AB × EF = AC × DE
• C
  BC × DE = AB × EF
• D
  BC × DE = AB × FD

Answer: B.