Triangle Properties and Transformations

The video covers practice problems for lesson 15, focusing on drawing isosceles and right triangles with specific angles, understanding triangle angle sums and similarity, exploring obtuse angles, and describing transformations such as translation, reflection, and rotation. It also includes creating scale copies of quadrilaterals.

How many equal angles does an isosceles triangle have?

• One

• Two

• None

• Three

What is the third angle in a right triangle if one angle is 40 degrees?

• 60 degrees

• 50 degrees

• 80 degrees

• 70 degrees

Which of the following angle sets can form an equilateral triangle?

• 60, 60, 60

• 90, 45, 45

• 120, 30, 30

• 100, 40, 40

Can a triangle have two obtuse angles?

• Yes

• Only if it's scalene

• No

• Only if it's isosceles

What happens to the other two angles in a triangle if one angle is obtuse?

• They can be any measure

• They must be equal

• They must add up to less than 90 degrees

• They must add up to more than 90 degrees

What type of transformation involves sliding a figure along a straight path?

• Rotation

• Dilation

• Reflection

• Translation

In a reflection, what is the line called that acts as a mirror?

• Axis of symmetry

• Line of reflection

• Perpendicular bisector

• Diagonal

What is the scale factor if a quadrilateral is reduced to half its original size?

• 1

• 3/2

• 1/2

• 2

If a quadrilateral is scaled by a factor of 3/2, how does its size compare to the original?

• It is inverted

• It is the same size

• It is larger

• It is smaller

What is the term for a four-sided figure?

• Hexagon

• Pentagon

• Triangle

• Quadrilateral