This video tutorial by Mr. Jay explains what a right triangle is, highlighting that it is a triangle with one 90-degree angle. The video covers how triangles can be classified by angles, with right triangles being one such classification. Examples are provided, showing the common use of a box to indicate a 90-degree angle. The video also explains that a triangle can only have one right angle, as the sum of all angles in a triangle is 180 degrees. The tutorial concludes with a reminder to identify right triangles by checking for a 90-degree angle.

What defines a right triangle?

• A triangle with two equal sides

• A triangle with one obtuse angle

• A triangle with three equal sides

• A triangle with one angle of exactly 90 degrees

Tags

CCSS.4.G.A.2

How can triangles be classified?

• By the length of their sides or the measure of their angles

• By color

• By their perimeter

• By their area

Tags

CCSS.4.G.A.2

What type of triangle is classified based on its angles?

• Right

• Isosceles

• Scalene

• Equilateral

Tags

CCSS.4.G.A.2

Can a right triangle be also classified based on its sides?

• Yes, as isosceles or scalene

• No, it is always scalene

• No, only by angles

• Yes, but only as equilateral

Tags

CCSS.4.G.A.2

What symbol is commonly used to indicate a right angle in diagrams?

• A small square

• A star

• A triangle

• A circle

Tags

CCSS.4.G.A.1

What does a box in the corner of a triangle typically represent?

• A right angle

• An undefined angle

• An obtuse angle

• An acute angle

Tags

CCSS.4.G.A.1

Why can't a triangle have two right angles?

• It would have to be a square

• The sum of angles would exceed 180 degrees

• The angles would not add up to 180 degrees

• It would no longer be a triangle

Tags

CCSS.8.G.A.5

What is the sum of the angles in any triangle?

• 360 degrees

• 90 degrees

• 180 degrees

• 270 degrees

Tags

CCSS.8.G.A.5

If a triangle has angles of 45 degrees and 90 degrees, what is the third angle?

• 45 degrees

• 55 degrees

• 90 degrees

• 35 degrees

Tags

CCSS.8.G.A.5

In a right triangle, if one angle is 27 degrees, what is the measure of the other non-right angle?

• 63 degrees

• 53 degrees

• 73 degrees

• 43 degrees

Tags

CCSS.8.G.A.5