Room 28
Learning Objectives
Grade F
Grade F
To investigate and then remember that the
angles in a triangle add to 180o.
How do we know that the angles in an equilateral triangle will always be 60o?
Grade E
To investigate and then remember that the sum of the angles in a quadrilateral is 360o.
How can you show that the angles in a quadrilateral always add to 360o?
To be able to define and then calculate the exterior angle of a triangle and quadrilateral.
Can you prove that the external angle of a triangle is equal to the two opposite sides?
Resources
How do we know that the angles in an equilateral triangle will always be 60o?
Grade E
To investigate and then remember that the sum of the angles in a quadrilateral is 360o.
How can you show that the angles in a quadrilateral always add to 360o?
To be able to define and then calculate the exterior angle of a triangle and quadrilateral.
Can you prove that the external angle of a triangle is equal to the two opposite sides?
Resources
Grade F
Angles in a triangle
Ten Ticks - 5, 3, pages 19-20
Triangle Trail (print)
Grade E
Angles in a quadrilaterals
Ten Ticks, 5, 3, page 21
Homework
Learning Objectives for next lesson:
Grade E
To be able to construct Side-Angle-Side (SAS) & Angle-Side-Angle (ASA) triangles.
Are there are triangles that you can see cannot be constructed, even without trying?
Grade D
To be able to construct Side-Side-Side (SSS) triangles.
If you multiply the side lengths all by two, what is the effect on the
shape of the triangle?
