Mathematics (Syllabus D) · May / June 2021 · Paper 11 · Question 17

A D C E B NOT TO SCALE The diagram shows an isosceles triangle ABC where AB AC = . D is a point on AC such that angle ° ADB 90 = . E is a point on AB such that angle ° AEC 90 = . Show that triangles ADB and AEC are congruent. Give a reason for each statement you make. [3]

Read automatically from the paper; the printed page above is exact.