Respuesta :

Step-by-step explanation:

Ok, it's simple just pay attention. :)

Can see that the bottom-left angle of the triangle is right (90°);

because, of the little square there: so if you know, all triangles'

internal angles always add up to 180°

So 55° + 90°= 145°

180° - 145° = 35° so the three angles' are 55°; 90°; & 35°.

Okay?

I can see already that the angle on the left is 2/3 smaller than

the bottom one; so, it equals approx. ~66.7 (exactly 66.666...)

Now, can you continue doing it from the data I gave you now?

Good Luck! :)

David Edward.


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