circular measure

[gaunt nymph]

How to do q10

[frosty birch]

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[wide portal]

Note that triangle ABC is isoceles with base AB and height CD

[gaunt nymph]

So I only need to find the coords for A and B using the eqn right? and since it lies on the axis the x and y would be 0 respectively right?

[wide portal]

yes

so from that (and your usual coordinate geometry formulas) you can determine D and subsequently the needed lengths

for b, you know the radius of the circle centered at C (or at least can find it), to which law of cosines can be used (or if you know the trig based area of a triangle formula, you can use that too)

for c, usual nonsense of subtracting smaller areas from larger

[gaunt nymph]

Aight I get it now👍

[gaunt nymph]

Thx for the help