Practice30 Create account

An isosceles triangle has two equal sides of 17 cm each and a base of 16 cm. Find its area.

Competition practiceGeometry

A $120 cm^{2}$
B $136 cm^{2}$
C $240 cm^{2}$
D $128 cm^{2}$

Step-by-Step Solution

The altitude to the base bisects it:

1 7^{2} - 8^{2} = 225 = 15

cm. Area

= \frac{1}{2} \times 16 \times 15 = 120 cm^{2}

.

Answer: A)

120 cm^{2}

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Geometry practice questions

More Geometry practice

G is the centroid of a triangle ABC whose area is 72 cm², and D is the midpoint of BC.…Two similar triangles have areas of 81 cm² and 144 cm². The altitude of the larger one…In triangle ABC, AB = 6 cm, AC = 3 cm and ∠BAC = 120°. The bisector of ∠A meets BC at D.…An equilateral triangle ABC is inscribed in a circle. P is a point on the minor arc BC…Triangle ABC has AB = 13 cm, BC = 14 cm and CA = 15 cm. D is the point on BC with BD =…