200 likes | 703 Views
Target Mindy scored exactly 100 on this dart board. How many darts did she throw, and where did they land?. Target Answer. Mindy shot 6 darts. She hit the 16, 2 times and hit the 17, 4 times. 16 x 2 = 32 17 x 4 = 68 32 + 68 = 100. Triangles. Lesson 10-4. Triangle.
E N D
Target Mindy scored exactly 100 on this dart board. • How many darts did she throw, and where did they land?
Target Answer • Mindy shot 6 darts. • She hit the 16, 2 times and hit the 17, 4 times. • 16 x 2 = 32 • 17 x 4 = 68 • 32 + 68 = 100
Triangles Lesson 10-4
Triangle • A triangle is a figure that has 3 sides and 3 angles. The sum of the measure of the angles is 180° • m<1 + m<2 + m<3 = 180° 1 2 3
Find the missing angle measure • <1 = 50° <2= 75° <3 = ?
Find the missing angle measure • <1 = 50° <2= 75° <3 = ? • 50 + 75 = 125 • 180 – 125 = 55°
Classify Triangles Using Angles • Acute Triangle • Properties: All acute angles.
Classify Triangles Using Angles • Right Triangle • Properties: 1 right angle.
Classify Triangles Using Angles • Obtuse Triangle • Properties: 1 obtuse angle.
Classify Triangles Using Sides • Scalene Triangle • Properties: No congruent sides.
Classify Triangles Using Sides • Isosceles Triangle • Properties: At least 2 congruent sides. This symbol represents that the sides are congruent.
Classify Triangles Using Sides • Equilateral Triangle • Properties: 3 congruent sides.
Naming Triangles • Triangles have a 2 part name. • The first part of the name, names the angles (acute, obtuse, or right) • The second part of the name, names the sides (scalene, isosceles, or equilateral) • Example: Obtuse Scalene
Name the Triangle • Acute Scalene
Name the Triangle • Right Scalene
Name the Triangle • Acute Equilateral
Find the missing angle. Then classify the triangle as acute, right, or obtuse. • 50 °, right x 40°
Find the missing angle. Then classify the triangle as acute, right, or obtuse. • 135 °, obtuse 20° 25° x
Find the missing angle. Then classify the triangle as acute, right, or obtuse. • 20 °, obtuse 30° x 130°
Don’t Forget • Homework: Lesson 10-4 # 1-18 all