With compass point on A and compass width equal to the second length given, draw an arc on the ray [AX, as shown. Label the point of intersection of the arc C.
X C
5
Using a ruler or straight edge, join B to C to produce the required triangle.
XC
A
B
A
B
Included side is the side between two given angles.
In this triangle, the side c is the included side between ∠A and ∠B.
A c
Construct a triangle, given two angles and the side in between them (ASA)
1
Draw a rough sketch of the triangle to be constructed. Include the given information in your sketch.
A 3
With the centre of your protractor on the point A and in line with AB, measure one of the given angles. Mark the point X as shown. Draw a ray from A through X.
X X Y A B A C 5
Label the intersection of the rays [AX and [BY that you constructed in steps 3 and 4 as C to produce the required triangle.
A X Y B C 2 12
Draw a line segment, [AB], which has a length equal to the length given.
B
A B 4
With the centre of the protractor on the point B and in line with AB, measure the other given angle. Mark the point Y as shown. Draw a ray from B through Y.