BBC

Equation of altitudes and perpendicular bisectors

Now use the information you already have about finding the equation of a line and apply it to the dashed lines shown in these triangles. Remember, to find the equation of a line you need a point ...
TES

Perpendicular Bisectors & Lines | I Do, We Do, You Do | Year 10 Maths

Teach perpendicular bisectors and perpendicular lines with this print-free Year 10 maths lesson. The 86-slide editable PowerPoint combines animated construction demonstrations, illustrated vocabulary, ...
BBC

Applying the properties of shapes to determine an angle

In the diagram below, AB is the chord of a circle with centre O. OM is perpendicular to AB (meet at a right angle). Look at triangles OAM and OBM. The hypotenuses (OA and OB) are the same, as they are ...
TES

Constructing Angle Bisectors | I Do, We Do, You Do | Year 10 Maths | Print Free

Teach angle-bisector constructions with this print-free Year 10 maths lesson. The 83-slide editable PowerPoint combines animated demonstrations, illustrated vocabulary, matched modelling, assessment ...
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Using angle bisector theorem to determine missing length of a triangle

👉 Learn how to solve with similar triangles. Two triangles are said to be similar if the corresponding angles are congruent (equal). Note that two triangles are similar does not imply that the length ...