Question

1.ABCD-patrulater convex
∡A=45°
∡B=63°
∡C=143°
--------------/--
∡D=?


2.ABCD-patrulater convex
∡A=90
{∡B,∡C,∡D}dirct proportional cu {5,6,7}
∡A,∡B,∡C,∡D=?


ABCD-parulater convex
PERIMENTRUL ABCD=100
PERMINTRUL=ABC=60
AC=16
--------------/---
PERMINTRUL=ABCD ?



VA ROGGGG REPEDEEEE

Answer 1

Răspuns:

1.

45°+63°+143°+ <D =360°

251+<D= 360°

<D = 360°-251°=109°

2.