By CK-12 Foundation

CK-12’s Geometry - moment version is a transparent presentation of the necessities of geometry for the highschool scholar. subject matters contain: Proofs, Triangles, Quadrilaterals, Similarity, Perimeter & sector, quantity, and variations. quantity 1 contains the 1st 6 chapters: fundamentals of Geometry, Reasoning and evidence, Parallel and Perpendicular strains, Triangles and Congruence, Relationships with Triangles, and Polygons and Quadrilaterals.

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**Sample text**

Apply the Protractor Postulate and the Angle Addition Postulate. Review Queue Answer the following questions. Label the following geometric figure. What is it called? Find , and . Find and . is between and on . If and , what is ? What postulate do you use to solve this problem? Know What? Back to the building blocks. Every block has its own dimensions, angles and measurements. Using a protractor, find the measure of the three outlined angles in the “castle” to the right. Also, determine which other angles are equal to these measurements.

All of the green directions have the same angle measure, , and the purple have the same angle measure, . and all have different measures, even though they are all apart. Review Questions Find the measure of an angle that is complementary to if is Find the measure of an angle that is supplementary to if is Use the diagram below for exercises 3-7. Note that . Name one pair of vertical angles. Name one linear pair of angles. Name two complementary angles. Name two supplementary angles. Given that , find: For 8-15, determine if the statement is ALWAYS true, SOMETIMES true or NEVER true.

Know What? Revisited The pentagon is divided up into 10 sections, all quadrilaterals. More specifically, there are 5 rectangles and 5 kites. None of these dividing lines are diagonals because they are not drawn from vertices. Review Questions For questions 1-6, classify each triangle by its sides and by its angles. Can you draw a triangle with a right angle and an obtuse angle? Why or why not? In an isosceles triangle, can the angles opposite the congruent sides be obtuse? Construction Construct an equilateral triangle with sides of 3 cm.