Classifying Triangles and Measuring Angles

The video tutorial covers the classification of triangles by their sides and angles. It begins with an introduction to the topic, followed by a real-world example using the Epcot Center's Spaceship Earth. The instructor explains how to classify triangles based on side lengths (equilateral, isosceles, scalene) and angles (acute, right, obtuse). A hands-on section demonstrates measuring triangles with a ruler and protractor. The video concludes with drawing exercises to reinforce the classification concepts.

What famous building is mentioned as having a pattern of triangles?

• The Gherkin

• The Louvre

• Burj Khalifa

• Epcot Center's Spaceship Earth

Tags

CCSS.RI.3.10

CCSS.RI.4.10

CCSS.RI.5.10

CCSS.RI.6.4

CCSS.RI.7.4

What type of triangle has all sides of equal length?

• Equilateral triangle

• Right triangle

• Scalene triangle

• Isosceles triangle

Tags

CCSS.4.G.A.2

How many congruent sides does an isosceles triangle have?

• One

• Two

• Three

• None

Tags

CCSS.2.G.A.1

What type of angle is less than 90 degrees?

• Obtuse

• Right

• Straight

• Acute

Tags

CCSS.4.G.A.1

Which triangle is classified by having angles less than 90 degrees?

• Isosceles

• Equilateral

• Acute

• Scalene

Tags

CCSS.4.G.A.2

What tool is used to measure the angles of a triangle?

• Caliper

• Compass

• Protractor

• Ruler

Tags

CCSS.4.MD.C.6

What type of triangle has sides of different lengths?

• Isosceles

• Acute

• Equilateral

• Scalene

Tags

CCSS.4.G.A.2

What is an angle called that is greater than 90 degrees but less than 180 degrees?

• Acute

• Right

• Obtuse

• Straight

Tags

CCSS.4.G.A.1

Can a triangle be both right and equilateral?

• Only in non-Euclidean geometry

• No, never

• Yes, sometimes

• Yes, always

Tags

CCSS.4.G.A.2

Which triangle has exactly two equal sides?

• Scalene

• Equilateral

• Isosceles

• Acute

Tags

CCSS.4.G.A.2