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1.5 Basic Constructions. Chapter 1 Tools of Geometry. 1.5 Basic Constructions. Construction : use a straightedge and a compass to draw a geometric figure Straightedge : “straight edge” or a ruler Compass : geometric tool used to draw circles and parts of circles and arcs
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1.5 Basic Constructions Chapter 1 Tools of Geometry
1.5 Basic Constructions Construction: use a straightedge and a compass to draw a geometric figure Straightedge: “straight edge” or a ruler Compass: geometric tool used to draw circles and parts of circles and arcs *Examples 1 and 2 on page 34-35
1.5 Basic Constructions Perpendicular lines: two lines that intersect to form right angles. The symbol means “is perpendicular to.” Perpendicular bisector: line, segment, or ray that is perpendicular to the segment at its midpoint T *Example 3 on page 36
1.5 Basic Constructions Angle bisector: ray that divides an angle into two congruent coplanar angles; it’s endpoint is at the vertex of the angle KN bisects <JKL so that m<JKN = 5x – 25 and m<NKL = 3x + 5. Solve for x and find m<JKN. J K N L *Example 5 page 37
Homework pg 37 1-14 all, 37-40