# CK-12 Geometry - Second Edition, Volume 2 of 2 by CK-12 Foundation

By CK-12 Foundation

CK-12’s Geometry - moment variation is a transparent presentation of the necessities of geometry for the highschool pupil. issues contain: Proofs, Triangles, Quadrilaterals, Similarity, Perimeter & sector, quantity, and alterations. quantity 2 comprises the final 6 chapters: Similarity, correct Triangle Trigonometry, Circles, Perimeter and region, floor sector and quantity, and inflexible adjustments.

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Extra info for CK-12 Geometry - Second Edition, Volume 2 of 2

Sample text

Because we are looking for length, we only use the positive answer. Length is never negative. Example 3: Find the missing side of the right triangle below. Solution: Here, we are given the hypotenuse and a leg. Let’s solve for . Example 4: What is the diagonal of a rectangle with sides 10 and ? Solution: For any square and rectangle, you can use the Pythagorean Theorem to find the length of a diagonal. Plug in the sides to find . Pythagorean Triples In Example 2, the sides of the triangle were 8, 15, and 17.

First, all the corresponding angles need to be congruent. In rectangles, all the angles are congruent, so this condition is satisfied. Now, let’s see if the sides are proportional. . This tells us that the sides are not in the same proportion, so the rectangles are not similar. We could have also set up the proportion as and . , so you would end up with the same conclusion. Scale Factors If two polygons are similar, we know the lengths of corresponding sides are proportional. If is the length of a side in one polygon, and is the length of the corresponding side in the other polygon, then the ratio is the scale factor relating the first polygon to the second.

Round to the nearest tenth. The president, vice-president, and financial officer of a company divide the profits is a 4:3:2 ratio. If the company made \$1,800,000 last year, how much did each person receive? Many recipes describe ratios between ingredients. For example, one recipe for paper mache paste suggests 3 parts flour to 5 parts water. If we have one cup of flour, how much water should we add to make the paste? A recipe for krispy rice treats calls for 6 cups of rice cereal and 40 large marshmallows.