How do I create (see image)

How do I create a point D on the line AB from drawing a line square upwards from C. (So the new line is 90 degrees up on line BC and I need the point where this line crosses AB)

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image

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Thanks for your replhy

but this is not what I hoped to ask. The line Needs to be square on BC. NOT on AB.

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Make the angle formula “line BC -90°”.

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Sometimes on a Sunday and my brain in neutral THANK you both

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Not sure why I’m awake, should be asleep.. but here’s another solution. Since it’s a right angle and we’re given the angle and adjacent side, we can use the Tan trig function to solve for the length of the opposite side. :thinking:

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