5.1 Polygon Sum Conjecture. Angle Exploration Equilateral Triangle 60°
4.1 apply triangle sum properties
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Transcript of 4.1 apply triangle sum properties
GEOMETRYMILBY HIGH SCHOOL
MR. SAUCEDO
4.1 Applying Triangle Sum Properties
OBJECTIVE
We will classify triangles and find measures of their angles.
REVIEW
On your notebook, draw an example of the following. A triangle A Scalene Triangle Isosceles Triangle Equilateral Triangle Acute Triangle Right Triangle Obtuse Triangle Equiangular Triangle
CLASSIFYING TRIANGLES
We can classify We can also classify
triangles by their … Triangles by their…
REVIEW:Classifying triangles by their angles
REVIEWClassifying by Triangle Sides
CHECKPOINT
CLASSIFY THE FOLLOWING TRIANGLES. (WORD BANK: Scalene, isosceles, equilateral, acute, right, obtuse,
equiangular)
CHECKPOINT
Label the followingTriangles by theirAngles and sides.
GUIDED PROBLEM 1
Classify the triangleBy its sides, then Determine if is a Right triangle.
CHECKPOINT
Classify the triangle by its sides, then determine if is a right triangle.
TRIANGLE SUM THEOREM
The sum of the measures of the interior angles of a triangle is 180 degrees.
EXTERIOR ANGLES
EXTERIOR ANGLE THEOREM
The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non adjacent interior angles.
CHECKPOINT
Find the measurement of Angle x.
GUIDED PROBLEM
Find the measure of the exterior angle.
CHECKPOINT
Find the measurement of the exterior angle CBD.
CHECKPOINT
Find x.
INDEPENDENT PRACTICEEnter the responses in your clickers.
1. Problem 52. Problem 12: What kind of triangle is it?3. Problem 12: Is it a right triangle?4. Problem 14: what is x?5. Problem 16: What is x?6. Problem 197. Problem 228. Problem 319. Problem 34: what is x?
HOMEWORK
SECTION 4.1
Problems: 1, 2, 3, 4, 7, 10, 11, 14, 15, 17, 18, 19, 20, 22.
Pre AP: Add problem 23 & 25.