Question

Help SOS LOTS OF SOS

Answer 1

i think its 12 :)

Explanation:

20 + 48 = 68

180 - 68 = 112

20 + 48 + 112 = 18 (a full triangle!)

Answer 2

= 52 cm

Explanation:

C²= a²+ b²

C²= 48²+ 20²

C²= 2304 + 400

√C²= √2704

C = 52 cm