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Question

Triangle ABC is an isosceles triangle in which ∠C = 90°. If AC = 8 cm, find AB.

The correct answer is

8√2 cm

\(AC=BC=8,\quad AB=\sqrt{8^2+8^2}=8\sqrt2\,\mathrm{cm}\)

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Important Questions from Plane Figures

  1. If the area of a square is 625 cm 2, then what is the perimeter of the square?

  2. The perimeter of a semi circle is 25.7 cm. What is its diameter (in cm)? (π = 3.14)

  3. The area of an isosceles right angled triangle is 121 cm 2. Find its hypotenuse.

  4. In Δ ABC, length of perpendicular from A to BC is 15 cm and BC = 8 cm and AC = 24 cm,  then find the length of perpendicular from B to AC.
  5. Two sides of a triangle are of length 5 cm and 1.5 cm. The length of third side of the triangle cannot be

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