Neco 2020 Mathematics Question 13

Practice essay / theory question 13 from the 2020 Neco Mathematics examination. This question covers Plane Geometry, Triangle, Angle Bisector, Area, Incircle .

Neco 2020 Mathematics Essay / Theory

Topics: Plane Geometry Triangle Angle Bisector Area Incircle

Question 13 NECO • 2020 • MATHEMATICS • essay

In triangle \(ABC\), \(AB = 12\) cm, \(AC = 15\) cm and \(\angle BAC = 60^{\circ}\). The internal bisector of \(\angle BAC\) meets side \(BC\) at \(D\). From \(D\) a perpendicular is drawn to side \(AB\) meeting it at \(E\).

Question Parts

( a )

Find the length of side \(BC\).

( b )

Using the angle‑bisector theorem, determine the length of \(BD\).

( c )

Calculate the area of triangle \(ADE\).

( d )

Find the radius of the incircle of triangle \(ABC\).

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Neco 2020 Mathematics Question 13. It is one of the essay questions from the 2020 Neco Mathematics examination.

The question covers Plane Geometry, Triangle, Angle Bisector, Area, Incircle .

View More Neco 2020 Mathematics Questions More Neco Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support