 | High schools - 1917 - 404 pages
...equals angle B. Homologous angle Sec. 94. Q :E :D :" Discussion as found in our own manual. "Ex. 64-T. In an isosceles triangle the angles opposite the equal sides are equal. 1. Read the theorem and underscore the important words. Draw the figure required by theorem and check... | |
 | Mathematics - 1917 - 284 pages
...say that two lines are equal by identity, means that they are really the same line. 77b. Theorem : In an isosceles triangle the angles opposite the equal sides are equal. Given: Let ISC be an isosceles triangle, having IS SC. To Prove: ZI = Z C. Proof: Let SF be drawn so... | |
 | Education - 1917 - 786 pages
...equals angle B. Homologous angle Sec. 94. Q:E:D:" Discussion as found in our own manual. "Ex. 64-T. In an isosceles triangle the angles opposite the equal sides are equal. 1. Read the theorem and underscore the important words. Draw the fignre required by theorem and check... | |
 | Herbert Ellsworth Slaught - 1918 - 344 pages
...= Z B'. This is indicated as shown in Fig. 2. BASE ANGLES OF AN ISOSCELES TRIANGLE 109. THEOREM IV. In an isosceles triangle the angles opposite the equal sides are equal. o D Given A ABC in which sides AC and BC are equal. To prove that £A = ZB. Proof : Let CD be the bisector... | |
 | Claude Irwin Palmer - Geometry, Solid - 1918 - 192 pages
...construct an isosceles triangle when the base and one of the equal sides are given. § 86. Theorem. In an isosceles triangle, the angles opposite the equal sides are equal. § 87. Theorem. An equilateral triangle is also equiangular. § 88. Theorem. Each angle of an equilateral... | |
 | Herbert Ellsworth Slaught, Nels Johann Lennes - Geometry, Plane - 1918 - 360 pages
...indicated as shown in Fig. 2. PLANE GEOMETRY: BOOK I BASE ANGLES OF AN ISOSCELES TRIANGLE 109. THEOREM IV. In an isosceles triangle the angles opposite the equal sides are equal. Given A ABC in which sides AC and BC are equal. To prove that £A = ZB. Proof : Let CD be the bisector... | |
 | Claude Irwin Palmer, Daniel Pomeroy Taylor - Geometry - 1918 - 460 pages
...construct an isosceles triangle when the base and one of the equal sides are given. (Fig. 3.) 86. Theorem. In an isosceles triangle, the angles opposite the equal sides are equal. Given the isosceles triangle ABD having AB = DB. To prove ZA = ZD. Proof. Draw BC bisecting ZABD. Show... | |
 | Edson Homer Taylor, Fiske Allen - Mathematics - 1919 - 244 pages
...of the angles of a triangle equals 180°. II. The angles of an equilateral triangle are equal. III. In an isosceles triangle the angles opposite the equal sides are equal. IV. In any triangle if two sides are unequal, the angles opposite those sides are unequal and the angle... | |
 | Marie Gugle - Mathematics - 1920 - 268 pages
...usually drawn as dotted lines. Such construeX. Demonstration PROPOSITION III Theorem: ISOSCELES TRIANGLE In an isosceles triangle, the angles opposite the equal sides are equal* Si Given the isosceles triangle ABC, with AC equal to BC. To prove /.A = Z5. Proof. Method,^ A, S -... | |
 | Charles Austin Hobbs - Geometry, Solid - 1921 - 216 pages
...angle of one are equal respectively to the hypotenuse and an adjacent angle of the other. Prop. 12. In an isosceles triangle the angles opposite the equal sides are equal. Prop. 12, Cor. An equilateral triangle is also equiangular. Prop. 13. The bisector of the vertical... | |
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In an isosceles triangle the angles opposite the equal sides are equal. 
