- A2√7 cm
- B4√2 cm
- C3√3 cm
- D2√10 cm
Step-by-Step Solution
Cosine rule in triangle with ∠°: , so cm. (3√3 cm is the height, reached only at the midpoint.)
Answer: A) 2√7 cm
ABC is an equilateral triangle with side 6 cm, and D is the point on BC with BD = 2 cm. Find AD.
Competition practiceGeometry
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
In triangle ABC, ∠A = 90°, AB = 6 cm and AC = 8 cm. The bisector of ∠A meets BC at D.…AB ∥ CD and a transversal cuts AB at E and CD at F. If ∠AEF = (3y − 15)° and ∠EFD = (2y…An exterior angle of a triangle is 110° and one of the interior opposite angles is 45°.…A right triangle has legs 6 cm and 8 cm. How far is its centroid from the right-angle…In triangle ABC, AB = 7 cm, AC = 9 cm and BC = 8 cm. Find the length of the median AD.