Question

in a triangle abc,ab=ac=4cm and angle a =90 deegre. calculate the area of triangle abc.

Answer 1

triangle has one angle a is 90 it mean it is right angle triangle . so use area of triangle=1/2.perpendicular.base
=1/2 (ac).(ab)
=1/2 (4)(4)=8 cm^2

Answer 2

one angle is of 90° then it means it is a right angled triangle

ab = height = 4

ac = base = 4

area of triangle 1/2 x b x h
  
 => 1/2x4x4
=> 8

so area is 8 cm²