Core stretch In the diagram, $AC=5$ cm, $BC=12$ cm, $\angle ACB=90^\circ$, and \(\angle ADC=45

Question

Core stretch In the diagram, $AC=5$ cm, $BC=12$ cm, $\angle ACB=90^\circ$, and $\angle ADC=45^\circ$. Find $12$ $CD$ $5$ $B$ $C$ $D$ $A$ $45^\circ$ Give non-exact lengths and areas to 3 significant figures, and angles to 1 decimal place.

Accepted Answer

(a)(i) $13$ cm (ii) $17$ cm (b) No, $\angle BAD\ne90^\circ$.

A Pythagorean triangle attached to a 45-degree triangle

A Pythagorean triangle attached to a 45-degree triangle

Solution:

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