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# Pre-Cal 20S December 1, 2008

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Workshop review of geometry.

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### Pre-Cal 20S December 1, 2008

1. 1. Geometry Workshop il buco nero by ﬂickr user paolo màrgari
2. 2. 2 The area of ﬁgure F is 30 cm . If the dimensions of ﬁgure F are multiplied by a scale factor of 4, what is the area of the new ﬁgure?
3. 3. Prove that if a parallelogram has one right angle then all its angles are right angles, that is, the angles of a rectangle are all right angles.
4. 4. The segment AB with A(5, –3) and B(–1, 3) is a diagonal of a square. Find an equation of the line containing the other diagonal. HOMEWORK
5. 5. The volume of solid S is 24 m 3 . If the dimensions of S are tripled, what is the volume of the newly formed solid?
6. 6. The area of ﬁgure F is 30 cm2 . Its dimensions are multiplied by a scale factor k to form a new ﬁgure with volume 270 cm 3 . What is the value of k?