Question

if a rectangular piece of dimensions 3 cm × 2 cm is cut from one corner of a rectangular sheet of dimensions 10 cm × 6 cm and attached to it site projecting out of the rectangle what will be the change in perimeter of the new shape thus formed

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Answer 1

Answer:

Answer: Perimeter of new shape = 27 cm

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Answer 2

According To Question:-

In Fig. 13.30, ABC is an equilateral triangle

and AD is perpendicular to BC. Prove that

∆ADB = ∆ADC in three different

ways.

Solution:-

In △ADB and △ADC

AB=AC (given)

AD=AD (common side)

∠ADB = ∠ADC = 90°

SSA congruency

Hence,△ADB≅△ADC by RHS property