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Examples -> Geometry -> Two-dimensional geometric shapes -> Quadrilaterals

[Level: ] [Number of helps: 0] [Number of pictures: 0] [Number of steps: 21] [Number of characters: 0]

[Source: MathReference: Generic Math Textbook]

Calculate the area of the parallelogram if its altitudes are 3 and $2 \sqrt{3}$ cm, and the angle $between tham is$ 60°!

Exercise 2. [ID:345]

[Level: ] [Number of helps: 0] [Number of pictures: 0] [Number of steps: 11] [Number of characters: 0]

[Source: MathReference: Generic Math Textbook]

The paralell sides of the trapezoid orund the circle has length of 8 cm and 2 cm. Calculate the area of the trapezoid!

Exercise 3. [ID:373]

[Level: ] [Number of helps: 3] [Number of pictures: 3] [Number of steps: 22] [Number of characters: 0]

[Source: Hungary: Mathematics Graduation Intermediate Level [05.03.2016.] [Number of example: 14]]

Length of the sides of cyclic trapezoid are: AB = 5 cm, BC = 2,5 cm, CD = 2 cm and DA = 2,5 cm.

a) Calculate the angles of the trapezoid!
b) Determine the ratio of ABC and ACD triangles!
c) The inner angles of the trapezoid are marked with an arc of 5 mm radius. Calculate the sum of the four arc lengths!