17. Use the expressions for the segment lengths to write and solve an equation for x. 8 + XZ 18. A sculpture in the shape of a square-based pyramid is being added to the courtyard of a building, A scale model of the sculpture has base sides of 5 feet and a height of 4 feet. Determine the volume of the actual sculpture. which will be scaled up by a factor of 6. 19. Given: P is the midpoint of TO and RS . Prove: ATPR = AOPS Complete the proof. Proof: Statements Reasons 1. P is the midpoint of TO and RS. 1. Given 2. TP = OP, RP = SP 2. [1] 3. [2] 3. Vertical Angle Theorem 4. ATPRE AOPS 4. [3]