WAEC (WASSCE) Mathematics · Plane Geometry
Triangles and Polygons: WAEC Mathematics Past Questions and Answers
What the WAEC syllabus covers in Triangles and Polygons
Our summary: The angle and side rules for triangles, special quadrilaterals and other polygons.
- The sum of the angles of a triangle is 2 right angles
- The exterior angle of a triangle equals the sum of the two interior opposite angles
- Congruent triangles
- Properties of special triangles: isosceles, equilateral, right-angled, etc.
- Properties of special quadrilaterals: parallelogram, rhombus, square, rectangle, trapezium
- Properties of similar triangles
- The sum of the angles of a polygon
- Property of exterior angles of a polygon
- Parallelograms on the same base and between the same parallels are equal in area
Syllabus content © The West African Examinations Council (WASSCE (harmonised West African syllabus)).
WAEC (WASSCE) Mathematics questions on Triangles and Polygons
- WAEC 2024The interior angle of a regular polygon is 168º. Find the number of sides of the polygon.
- WAEC 2024Four of the angles of a hexagon sum up to 420º. If the remaining angles are equal, find the value of each of the angles.
- WAEC 2023An equilateral triangle has a side 2 cm. Calculate the height of the triangle.
- WAEC 2023Write the name of a triangle with the vertices (1, -3), (6, 2) and (0,4)?
- WAEC 2023The interior angle of a regular polygon is 6 times its exterior angle find the number of sides of the polygon.
- WAEC 2023The diagonals of a rhombus are 16 cm and 12 cm find the length of the side.
- WAEC 2022An exterior angle of a regular polygon is 22.5°. Find the number of sides.
- WAEC 2021The height of an equilateral triangle of side is 10 3√ cm. calculate its perimeter.
- WAEC 2021Which of the following is not an exterior angle of a regular polygon?
- WAEC 2020Which of the following is not a sufficient condition for two triangles to be congruent?
- WAEC 2020Each interior angle of a regular polygon is 168 ^o . Find the number of sides of the polygon
- WAEC 2020Find the sum of the interior angle of a pentagon.
- WAEC 2019The interior angles of a polygon are 3x ^o , 2x ^o , 4x ^o , 3x ^o and 6x ^o . Find the size of the smallest angle of the polygon.
- WAEC 2018The diagonals of a rhombus WXYZ intersect at M. If MW = 5cm and MX = 12cm, calculate its perimeter
- WAEC 2018The angles of a polygon are x, 2x, 2x, (x + 30^o ), (x + 20^o ) and (x - 10^o ). Find the value of x
- WAEC 2017Which of the following is true about parallelogram?
- WAEC 2017Three exterior angles of a polygon are 30 ^o , 40 ^o and 60 ^o . If the remaining exterior angles are 46 ^o each, name the polygon.
- WAEC 2016Kweku walked 8m up to slope and was 3m above the ground. If he walks 12m further up the slope, how far above the ground will he be?
- WAEC 2016The ratio of the exterior angle to the interior angle of a regular polygon is 1:11. How many sides has the polygon?
- WAEC 2015Two angles of a pentagon are in the ratio 2:3. The others are 60o each. Calculate the smaller of the two angles
- WAEC 2014Each exterior angle of a polygon is 30o. Calculate the sum of the interior angles
- WAEC 2013An interior angle of a regular polygon is 5 times each exterior angle. How many sides has the polygon?
- WAEC 2012The sum of the interior angles of regular polygon is 1800o. How many sides has the polygon?
- WAEC 2012In XYZ, /XY/ = 8cm, /YZ/ = 10cm and /XZ/ = 6cm. Which of these relation is true?
- WAEC 2011A regular polygon of n sides has each exterior angle to 45o. Find the value of n
- WAEC 2010The sum of the exterior of an n-sided convex polygon is half the sum of its interior angle. find n
Years with Triangles and Polygons questions in DeeepSolve's question bank
From the past questions DeeepSolve holds, not a count of everything the exam body has set.
- 2024
- 2023
- 2022
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010