Answers>Maths>GCSE>Article

An isosceles triangle ABC has a perimeter of 16cm. AB = x+3, AC = x+4. Calculate the area of ABC.

Find x.2(x+3) + x+4 = 163x + 10 = 16x = 2So: AB = 5cm, BC = 5cm, AC = 6cmThen use '0.5 x base x height' to find area.Base = 6Height use Pythagoras: 5^2 - 3^2 = x^225 - 9 = 16x = 40.5 x 6 x 4 = 12cm^2

Answered by Amelie M. • Maths tutor

4510 Views

See similar Maths GCSE tutors

An isosceles triangle ABC has a perimeter of 16cm. AB = x+3, AC = x+4. Calculate the area of ABC.

Related Maths GCSE answers

Express x^2 + 10x – 3 in the form (x + p)^2 + q

Please sketch and factorize the quadratic 3x^2+10x+3.

f(x) = (2x+3)/(x-4). Work out f^-1 (x)

ABC is a right-angled triangle (B being the right angle). Is AB=12 and BC=9, What is Angle A? (3.s.f.)