Pupil outcome: I can form and solve equations using my knowledge of angles and polygons. Key learning points: - Missing angles can be found in polygons using knowledge of exterior and interior angles. - A missing angle can be represented...

Pupil outcome: I can construct a triangle from two side lengths and an angle not between them. Key learning points: - The first side can be drawn accurately with a ruler - All triangles with these measurements in the same place are...

Pupil outcome: I can construct a right-angled triangle given the length of the hypotenuse and one other side length. Key learning points: - The shorter side can be drawn accurately with a ruler - The perpendicular through the end point...

Pupil outcome: I can derive and use the theorem: the angle at the centre of the circle is twice the angle at any point on the circumference. Key learning points: - A theorem is a statement that can be demonstrated to be true by accepted...

Pupil outcome: I can recognise that for congruent shapes both side lengths and angle sizes are preserved. Key learning points: - Two shapes are not congruent if there is a pair of lengths with a scalar not equal to one. - Congruent does...

In this video tutorial, students are guided through the process of finding missing angle measures in triangles using simple equations and the triangle sum theorem. The teacher demonstrates step-by-step how to solve for the unknown angles...

👉 Learn how to find the missing side of a triangle. A triangle is a polygon with three sides. Triangles are classified on the basis of the angles or on the basis of the sides. The classification of a triangle on the basis of the sides...

👉 Learn how to find the value of an unknown variable in the expressions representing the values of angles given the relationship between the angles. When given expressions representing the values of angles and the relationship between...

👉 Learn how to solve for an unknown variable using parallel lines and a transversal theorems. Two lines are said to be parallel when they have the same slope and are drawn straight to each other such that they cannot meet. In geometry,...

Not every triangle is a right-angle triangle, so we can't always use Pythagoras and SOHCAHTOA to find missing sides and missing angles. We instead use the sine rule or the cosine rule. They can both be used to find either missing...

👉 Learn how to find a missing angle of a right triangle. A right triangle is a triangle that has 90 degrees as one of its angles. The trigonometric identities of right triangles gives us the relationship between the angles of a right...

In this video we will discover how to find the missing side of a right angle triangle using SOHCAHTOA.



You should already know which side is the opposite, adjacent and hypotenuse. Sin, cos and tan are ratios between...

In this video we will discover how to find the missing side of a right angle triangle using SOHCAHTOA. You should already know which side is the opposite, adjacent and hypotenuse. In part 1 we discovered that sin, cos and tan are...

Master Find the missing Angle Measure using the Angle Sum Postulate

👉 Learn how to define and classify different angles based on their characteristics and relationships are given a diagram. The different types of angles that we will discuss will be acute, obtuse, right, adjacent, vertical, supplementary,...

👉 Learn how to determine the measure of the interior angles of a regular polygon. A polygon is a plane shape bounded by a finite chain of straight lines. A regular polygon is a polygon whose sides are congruent (equal). The interior...

👉 Learn how to find the value of an unknown variable in the expressions representing the values of angles given the relationship between the angles. When given expressions representing the values of angles and the relationship between...

👉 Learn how to find the value of an unknown variable in the expressions representing the values of angles given the relationship between the angles. When given expressions representing the values of angles and the relationship between...

👉 Learn how to find a missing side length of a right triangle. A right triangle is a triangle that has 90 degrees as one of its angles. The trigonometric identities of right triangles give us the relationship between the angles of a...

In this video we are going to discover what the sine rule is and how it works. For right angle triangles, we can use Pythagoras and SOHCAHTOA to find missing sides and missing angles. However, not every triangle is a right-angle...

In this video we will discover how to find a missing angle in a right angle triangle, when we already know the lengths of two sides. We use SOHCAHTOA to do this. You should already know what SOHCAHTOA is and how to use it. We saw how to...

👉 Learn how to find the missing measure of a segment. A segment is a line that has two endpoints. A segment can be subdivided into several portions. The length of the segment is the sum of all the sub-divisions of the segment. Thus, when...

This video shows how a student named Jack solved a math game called "Missing Angles" at a unique math fair. The game involves finding the right values for angles in different shapes of quadrilaterals, and Jack used basic knowledge of the...