



 
Hi Ele, In the solution to this problem you get to use Pythagoras' theorem many times. In my diagram the square base of the pyramid is $ABCD$ and the apex is $P.$ $E$ is the midpoint of $BD$ and $F$ is the midpoint of $BC.$ $ABD$ is a right triangle and $AB = DA = 2$ m. What is the length of $BD?$ What is the length $BE?$ $EBP$ is a right triangle. What is the length $PB?$ $FPB$ is a right triangle. What is the length $FP?$ What is the measure of the angle $EFP?$ Penny
 


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