Engineering Board Exam Reviewer · Triangles · medium
Find the area of an equilateral triangle with side length 10 cm.
- 43.30 cm2
- 50.00 cm2
- 86.60 cm2
- 25.00 cm2
Answer
A. 43.30 cm2
Solution
Area = 3/4s2= 3/4(100)=25 3 43.30 cm2.
More Triangles questions
- A triangle has sides 7, 8, and 9. Find its area using Heron's formula.
- In triangle ABC, angle A=50° and angle B=70°. Find angle C and classify the triangle as acute, right, or obtuse.
- The base of an isosceles triangle is 12 cm and each of the two equal sides is 10 cm. Find the height (altitude to the base).
- Triangle ABC is isosceles with AB=AC=10 and BC=12. Find the distance between its incenter and circumcenter.
- Find the area of the triangle whose medians are 9, 12 and 15.
- Find the radius of the circle inscribed in the right triangle with sides 7, 24 and 25.
- In a 30°-60°-90° triangle the hypotenuse is 14. Find the longer leg.
- An isosceles triangle has equal sides of 13 and a base of 10. Find its area.
- In a triangle with sides 8, 12 and 10, the bisector of the angle between the sides 8 and 12 meets the opposite side. Find the length of…
- Find the length of the median drawn to the side of length 12 in the triangle with sides 9, 12 and 15.