10. Developing Proof Supply the missing reasons in this two-column proof. In a plane, if a line is perpendicular to one of two parallel lines,
then it is perpendicular to the other.
Given: k I r, r|| s
Prove: kis
Statements
Reasons
Yk
21
1. kir
2. Z1 is a right angle.
3. mZ1 = 90
4. r | s
5. m2 = m_1
6. m2 = 90
7. Z2 is a right angle.
8. Kis
1. Given
a. ?
b. ?
4. Given
c. ?
d. ?
e. ?
f. ?

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left

For the equations below which statement is true ?

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10