2007-01-27 12:14:23 · 6 answers · asked by Marijoyce Y 1 in Science & Mathematics ➔ Mathematics
60 cm.
You have 4 30-60-90 triangles with the 7.5 cm side opposite the 30 degree angle. That makes each side = 15 and the perimeter =60 cm.
2007-01-27 12:30:57 · answer #1 · answered by davidosterberg1 6 · 0⤊ 0⤋
If
As the diagonal of a rhombus bisects the angles in triangle CDA all the angles would be 60 degrees.Or triangle CDA will be an equilateral triangle
Therefore,CD=DA=AC=15 cm
therefore,the lengths of the sides of the rhombus are 15 cm
Hence its perimetr is 4*15 or 60 cm
2007-01-27 12:49:52 · answer #2 · answered by alpha 7 · 0⤊ 0⤋
Angles B and C are supplementary. They upload to a hundred and eighty°. So C = a hundred and eighty - B = a hundred and eighty - sixty six = 114 in view that ABCD is a rhombus, the diagonals bisect the angles of the vertices. So attitude DCA = (a million/2) attitude C = (a million/2)(114) = fifty seven°
2016-11-01 11:04:07 · answer #3 · answered by ? 4 · 0⤊ 0⤋
30 rhombus have equal sides
2007-01-27 12:21:54 · answer #4 · answered by aj58078 4 · 0⤊ 0⤋
oy! daya mo! project 'to sa geometry ah! lagot!
2007-01-27 23:16:53 · answer #5 · answered by quack 3 · 0⤊ 0⤋
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2007-01-27 12:18:34 · answer #6 · answered by Trevy mayne 4 · 0⤊ 0⤋