Any triangle
Types of exercises: the law of cosines, type of triangle from its sides, area of a triangle from the sine of an angle.
Exercises are drawn at random from a large bank - every click gives a different set.
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Decide whether this triangle is acute, right or obtuse
A triangle has sides 15 cm, 10 cm and 7 cm.
Compute the area of the triangle
Two sides of a triangle are 24 cm and 18 cm, and the angle between them is 150 degrees.
Compute the cosine of the angle opposite the side of length 9 cm
A triangle has sides 9 cm, 3 cm and 9 cm.
Decide whether this triangle is acute, right or obtuse
A triangle has sides 8 cm, 20 cm and 20 cm.
Compute the area of the triangle
Two sides of a triangle are 40 cm and 3 cm, and the angle between them is 60 degrees.
Compute the length of the third side
Two sides of a triangle are 7 cm and 33 cm, and the angle between them is 120 degrees.
Decide whether this triangle is acute, right or obtuse
A triangle has sides 5 cm, 13 cm and 12 cm.
Compute the area of the triangle
Two sides of a triangle are 42 cm and 10 cm, and the angle between them is 135 degrees.
Compute the cosine of the angle opposite the side of length 6 cm
A triangle has sides 3 cm, 5 cm and 6 cm.
Decide whether this triangle is acute, right or obtuse
A triangle has sides 8 cm, 10 cm and 5 cm.
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