The stated lengths and angle measures of rhombus ABCD include the following:
1. AB = 10 units.
2. m∠CED = 90°.
3. m∠BCE = 74°
What is a rhombus?
In Mathematics and Geometry, a rhombus is a type of quadrilateral that is composed of four (4) equal sides and opposite interior angles that are congruent;
AB = 10 units.
Part 2.
Since a rhombus has two diagonals that bisect each other at right angles (90 degrees), the angle measure of CED is given by;
m∠CED = 90°
Part 3.
The opposite interior angles of a rhombus are congruent and the sum of all the four interior angles is equal to 360 degrees;
m∠BCD ≅ m∠BAD
m∠ABC ≅ m∠ADC
m∠ABC = 2 × 53
m∠ABC = 106°
m∠ABC + m∠ADC + m∠BCD = 360
106 + 106 + m∠BCD = 360
m∠BCD = 148°
m∠BCE = m∠BCD/2
m∠BCE = 148/2
m∠BCE = 74°