Wetzel

Math 155

10.2 – Triangles

10.1 – Review

            points –

            lines –

            planes –

            angles –

            degrees –

            acute angle –

            right angle –

            obtuse angle –

            straight angle -

            complementary angles –

            supplementary angles –

            vertical angles –

10.2 – Triangles

            def.:  a polygon, or geometric figure with three sides

            The sum of the three interior angles is 180º

            Classified according to their sides and/or angles.

                        Sides                                        Angles

                        Isosceles                                  Acute

                        Equilateral                                Right

                        Scalene                                    Obtuse

            Right Triangles –

                        hypotenuse –

                        legs –

            Pythagorean Theorem –

Similar Figures –

            def.: figures that have the same shape, but different size.

            Corresponding angles are equal.

            Corresponding sides are proportional.

HW:  p.552 #1-15odd, 21-25odd, 35-41odd