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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.

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Target mindy scored exactly 100 on this dart board l.jpg

Target Mindy scored exactly 100 on this dart board.

  • How many darts did she throw, and where did they land?


Target answer l.jpg

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 l.jpg

Triangles

Lesson 10-4


Triangle l.jpg

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 l.jpg

Find the missing angle measure

  • <1 = 50° <2= 75° <3 = ?


Find the missing angle measure6 l.jpg

Find the missing angle measure

  • <1 = 50° <2= 75° <3 = ?

  • 50 + 75 = 125

  • 180 – 125 = 55°


Classify triangles using angles l.jpg

Classify Triangles Using Angles

  • Acute Triangle

  • Properties: All acute angles.


Classify triangles using angles8 l.jpg

Classify Triangles Using Angles

  • Right Triangle

  • Properties: 1 right angle.


Classify triangles using angles9 l.jpg

Classify Triangles Using Angles

  • Obtuse Triangle

  • Properties: 1 obtuse angle.


Classify triangles using sides l.jpg

Classify Triangles Using Sides

  • Scalene Triangle

  • Properties: No congruent sides.


Classify triangles using sides11 l.jpg

Classify Triangles Using Sides

  • Isosceles Triangle

  • Properties: At least 2 congruent sides.

This symbol represents that the sides are congruent.


Classify triangles using sides12 l.jpg

Classify Triangles Using Sides

  • Equilateral Triangle

  • Properties: 3 congruent sides.


Naming triangles l.jpg

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 l.jpg

Name the Triangle

  • Acute Scalene


Name the triangle15 l.jpg

Name the Triangle

  • Right Scalene


Name the triangle16 l.jpg

Name the Triangle

  • Acute Equilateral


Find the missing angle then classify the triangle as acute right or obtuse l.jpg

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 obtuse18 l.jpg

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 obtuse19 l.jpg

Find the missing angle. Then classify the triangle as acute, right, or obtuse.

  • 20 °, obtuse

30°

x

130°


Don t forget l.jpg

Don’t Forget

  • Homework: Lesson 10-4 # 1-18 all


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