# Answer the 10th question. { NO LINKS }.{ NO ANSWERS FROM GOOGLE }.: 10. ABC is a triangle in which AB=AC=4 cm and $\angle \mathrm{A}=90°$. Calculate the area of $△$ABC. Also find the length of perpendicular from A and BC. Hint: By Pythagoras theorem, BC2=AB2+AC2=42+42=32 $⇒$BC =4$\sqrt{2}$cm.

Dear Student,
Consider the figure:

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Use isosceles triangle property.

Let angles be x

90+2x=180

x=45

draw the figure and measure it! good luck

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