TYPES OF TRIANGLES MELINDA ROSS PRE-ALGEBRA 5 TH GRADE Click to continue

MAIN MENU Definition of a triangle Click to go to the multiple choice question! Click on the pictures to learn about the different types of triangles! Definition of an Angle

TRIANGLE A polygon There are three corners (vertices) There are three sides

ANGLE Formed by two rays Two sides of a triangle make up an angle These two sides share a common endpoint called the vertex Endpoint

ACUTE TRIANGLES All angles of the triangle are less than 90 ⁰ This only is for the inside angles All the angles on the inside add up to 180 ⁰ Click to return to the Main Menu

EQUIANGULAR TRIANGLES All sides are equal All angles are equal to 60 ⁰ All angles add up to 180⁰

ISOSCELES TRIANGLES There are two equal sides and one unequal side The bottom left and right angles are equal The top angle is acute

RIGHT TRIANGLES Has a 90 ⁰ angle The longest side, which is opposite of the right triangle is called the hypotenuse The two short sides are legs. There is one 90⁰ angle and the other angles add up to 90⁰ hypotenuse

OBTUSE TRIANGLES There is one angle greater than 90 ⁰ The longest side is always opposite the obtuse angle The other angles add up to 90⁰

What is the longest side of a right triangle called? A A acute B hypotenuse C ve rtex D ray

INCORRECT Acute refers to an Acute Triangle. This means that all angles are less than 90 ⁰. Click to go back to the question!

INCORRECT Vertex is the point at which two rays meet. They make up the three sides of the triangles. Each side meets at a vertex!

INCORRECT A ray are two lines creating a vertex Endpoint Click to go back to the question!

CORRECT!! Click the arrow to continue to next slide

CONGRATULATIONS You have reached the end of the lesson! Today you have learned many different things about the types of triangles! Click the arrow to continue to the title screen for the next student