Plane Geometry: (Revised) |
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Common terms and phrases
AABC ABCD acute angle altitude angle equal angle formed angles are equal base bisects central angle chord circumscribed coincides corresponding sides diagonals diameter distance divided Draw drawn equal respectively equal sides equals in degrees equilateral triangle equivalent EXERCISES exterior external point figure Find the area Find the length Find the ratio formula geometry given circle given line given point given triangle hexagon hypotenuse inch inscribed angle interior angles intersecting isosceles trapezoid isosceles triangle locus measure median middle point number of degrees number of sides parallel lines parallelogram perimeter perpendicular bisector points equidistant Proof protractor prove quadrilateral radii radius rectangle regular polygon rhombus right angle right triangle secant segment semicircle sides equal similar polygons similar triangles square supplementary tangent Theorem third side triangle ABC triangles equal vertex angle vertices ZABC
Popular passages
Page 35 - If two triangles have two angles and the included side of one equal respectively to two angles and the included side of the other, the triangles are congruent.
Page 114 - The straight line joining the middle points of two sides of a triangle is parallel to the third side, and equal to half of it.
Page 134 - ... greater than the included angle of the second, then the third side of the first is greater than the third side of the second.
Page 214 - Two triangles which have an angle of one equal to the supplement of an angle of the other are to each other as the products of the sides including the supplementary angles.
Page 37 - Two triangles are congruent if two sides and the included angle of one are equal respectively to two sides and the included angle of the other.
Page 219 - ... they have an angle of one equal to an angle of the other and the including sides are proportional; (c) their sides are respectively proportional.
Page 223 - In any triangle, the square of the side opposite an acute angle is equal to the sum of the squares of the other two sides, minus twice the product of one of these sides and the projection of the other side upon it.
Page 204 - The area of any polygon may be found by dividing it into triangles by means of diagonals, computing the areas of these triangles, and adding the results.
Page 24 - A plane surface or a plane is a surface such that a straight line joining any two of its points lies entirely in the surface.
Page 33 - Two triangles are congruent if two angles and the included side of one are equal respectively to two angles and the included side of the other.