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circle theorem q help!

could somebody help me with this circle theorem? i’ll add a picture ximage.jpg
(edited 1 year ago)
h = 90 degrees

If all three points of the triangle are on the edge of the circle and one of the sides is the diameter, then that angle will always be 90 degrees
Original post by aalmondmilk
could somebody help me with this circle theorem? i’ll add a picture x

This is one of the circle theorems ... look them up - you have an angle in a semi-circle
Original post by aalmondmilk
could somebody help me with this circle theorem? i’ll add a picture ximage.jpg

Here is a link to the proof.
http://www.timdevereux.co.uk/maths/geompages/proof2.php

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