geometry

[high widget]

i need help with a b and c plz

[weak sonnet]

what have you tried?

[high widget]

i’ve done this so far

i’m not sure if a is right and also for b idk what other congruency marks i could put

[shrewd tangle]

A and B look good except in B, try to make the ray AD and side CB look the same. Having two congruent angles makes the triangle ACD an isosceles triangle. Then be sure to mark the congruencies.
For A, the word “across” works fine. The term that’ll be used most though is “opposite,” so that’s just something to keep in mind if you see it in tests or books

[high widget]

like this?

[shrewd tangle]

No, angles DAC and DCA should be congruent

[high widget]

o whoops one sec