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Read the posting on Sarin learns Lines and Angles (Math concept) to understand the concept of lines and angles.
Read the posting on Sarin learns Shapes and Solids in school (Math Concept) to know about shapes.
You can click and read the posting on Sarin learns the concept of Fraction (mathematics concept) to understand Portion or Fraction
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Upper primary school mathematics question UPQ343
In the figure below, not drawn to scale, ABCD is a rhombus. FG is a straight line. The size of ∠BEC is 3/5 the size of ∠ADC.
(a) Find ∠ x.
(b) Find ∠ y.
ABCD is a rhombus
∠ ADC = ∠ ABC = (1800 – 1150) = 650
AE and FG are straight lines
∠ x = ∠ ABC + ∠ GBC = 650 + 580 = 1230
∠ BEC is 3/5 of fraction of ∠ ADC
5 units = 650
1 unit = 130
∠ BEC = 3 × 130 = 390
FG is a straight line
∠ GBE = 1800 – 1230 = 570
∠ y = 1800 – 580 – 570 – 390 = 260