What is the value of X???

40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows.statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.

What rule describes a dilation with a scale factor of 4 and the center of dilation at the origin?

The area of each triangle is 7 square units. the surface area of the triangular prism is