Angles

$ABC\,$ is a straight line.

An isosceles triangle ABD has a 68° angle at D, with A, B and C on a straight line and an unlabelled exterior angle marked at B.

$ABD\,$ is an isosceles triangle with $A D = B D$ .

Show that the exterior angle at $B\,$ is $124∘124^\circ$

[4]

$ABC\,$ is a straight line.

An isosceles triangle ABD has a 68° angle at D, with A, B and C on a straight line and an unlabelled exterior angle marked at B.

$ABD\,$ is an isosceles triangle with $A D = B D$ .

Show that the exterior angle at $B\,$ is $124∘124^\circ$

[4]

Angles Questions