...of a triangle (or of any other figure) is the side on which it is A supposed to stand ; as A C. 461. The altitude of a triangle is the perpendicular distance from the vertex of the angle opposite the base to the base, or to the base produced ; as B D. 462. The area of a triangle...

...and the other side is the base. The vertical angle of a triangle is opposite the base, and its vertex is called the vertex of the triangle. The altitude...perpendicular distance from the vertex to the base, or to the base produced. TRIANGLES PROPOSITION XI 25 76. Theorem. Two triangles are equal if they have...

...any side has been taken as the base, the opposite angle is called the Vertical Angle and its vertex is called the vertex of the triangle. The Altitude of a triangle is the perpendicular drawn from the vertex to the base, produced if necessary. Thus in the triangle ABC, BC is the base,...

...the cone, the conical surface is called the lateral, or convex surface. 580. The altitude of a cone is the perpendicular distance from the vertex to the base, or the base produced. The axis of a cone is the line joining its vertex to the center of its base. 581. A circular cone is...

...base? when BC? when AC? 26. The vertex of the vertical angle is called the vertex of the triangle. 27. The altitude of a triangle is the perpendicular distance from the vertex of the triangle to its base, or its base produced. Can you draw the altitude of triangle ABC when C...

...points A, B, or C, Fig. 10, may be looked upon as the vertex, the opposite side is then called the base of the triangle. The altitude of a triangle is the perpendicular distance of the vertex from the base. CAC Fio. 10.— A triangle. Flo. 11.— Right-angled triangle Equilateral...

...it is supposed to stand. 399. The Vertical Angle of a triangle is the angle opposite the base. 400. The Altitude of a triangle is the perpendicular distance from the vertex of the vertical angle to the base, or to the base prolonged. 401. An Equilateral Triangle is a triangle...

...PROBLEM X. (Fig. 15). — To construct a triangle, knowing the base, altitude, and vertical angle. The altitude of a triangle is the perpendicular distance from the vertex to the base. Let the base be 3J", altitude 2i", and vertical angle 40°. Draw the line AB 3" long to represent the...

...points A, B, or C (Fig. 23) may be looked upon as the vertex ; the opposite side is then called the base of the triangle. The altitude of a triangle is the perpendicular distance of the vertex from the base. B BC Via. 23.— A Triangle. AC Flo. 24.— A Right-angled triangle. Equilateral...

...the angle opposite the base. Its vertex is called the vertex of the triangle. 66. The ALTITUDE of the triangle is the perpendicular distance from the vertex to the base, or the base produced ; as CD in the triangle ABC. 67. An EXTERIOR ANGLE of c a triangle is the angle included between any...