Divide 30 by half and add 12. What do you get?​

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ab=9, and ac=12, find hc.

Use complete sentences to differentiate between a regular tessellation, and a pure tessellation. be sure to include specific types of polygons in your explanation.

Plz ( true - false) all triangles have interior angles whose measure sum to 90.