Identify the flowchart proof for the two-column proof. Given: mPQR=90 and mb=5ma Prove: ma=15 Two-Column Proof 1. mPQR=90 , mb=5ma (Given) 2. ma+mb=mPQR ( s Add. Post.) 3. ma+5ma=90 (Subst. Prop. of = ) 4. 6ma=90 (Simplify.) 5. ma=15 (Div. Prop. of = ) The figure shows right angle P Q R. Angle Q consists of two smaller angles marked as a and b. Five boxes, three rows, two boxes in the first two rows and one box in the center of the third row. In the top left box, the measure of angle PQR equals 90 degrees and the measure of angle b equals 5 times the measure of angle a and the reason is Given. There is an arrow pointing to the first box in the second row. In the top right box, the measure of angle a plus the measure of angle b equals the measure of angle PQR and the reason is the Angle Addition Postulate. There is an arrowing pointing to the first box in the second row. In the first box of the second row, the measure of angle a plus the 5 times the measure of angle a equals 90 degrees and the reason is Substitution Property of Equality. There is an arrow pointing to the second box in the second row. In the second box in the second row, 6 times the measure of angle a equals 90 degrees and the reason is Simplify. There is an arrow pointing to the third row box. In the third row box, the measure of angle a equals 15 degrees and the reason is the Division Property of Equality. Five boxes, three rows, two boxes in the first two rows and on

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