Maths test revision - geometry
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26 Terms
acute angle size…
0-90 degrees
Right angle equals…
90 degrees
obtuse angle equals…
90-180 degrees
straight angle equals…
180 degrees
reflex angles equals…
180-360 degrees
revolution angle equals…
360 degrees
co-interior angles form a…
Sqaure C and sum to 180 degrees
complementry angles sum to…
90 degrees
supplementary angles sum to…
180 degrees
vertically opposite angles are equal too…
its opposite angle
angles in a revolution sum to…
90 degrees
Alternate angles form a…
Z
Corresponding angles form a…
F
scalene length
all three sides are of different lengths
isosceles length
2 sides are of equal length
Equilateral length is…
all three sides are of equal length
acute triangle
all angles are less than 90 degrees (all angles are acute)
right triangle
One angle is 90 degrees (one right angle)
obtuse triangle
one angle is between 90-180 degrees (one obtuse angle)
a triangle always equals…
180 degrees
Quadrilaterals can be…
convex or non-convex
Rectangle is…
a parallelogram with all sides 90 degrees
Rhombus is…
parallogram with all sides equal
square is…
Rhombus with all angles 90 degrees or rectangle with all sides equal
angle sum of a Quadrilateral
is 360 degrees
forumla for a quadrilateral…
(n-2) x 180 = answer