Core stretch In $\triangle ABD$, $AB=9$ cm, $AD=12$ cm and $BD=15$ cm. Line $AB$ is produc

Question

Core stretch In $\triangle ABD$, $AB=9$ cm, $AD=12$ cm and $BD=15$ cm. Line $AB$ is produced through $B$ to $C$, with $BC=6$ cm. $A$ $B$ $C$ $D$ $9$ $6$ $12$ $15$

Accepted Answer

(a) right-angled at $A$ (b) $3\sqrt{41}$ cm (c) $54\text{ cm}^2$ (d) $7.2$ cm (e) $3:2$.

An extended right triangle with area comparisons

An extended right triangle with area comparisons

Solution:

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