DOI Page / Citation link:
https://doi.org/10.11588/diglit.62828#0096
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No. 8, is a Right-angled Triangle, becaufe two of its fides
are perpendicular to each other, and confequently make an
angle of ninety degrees, as the line 9.90% Fig. 12, is perpendicular
to B A, therefore A 9.900 forms a right-angled triangle, compre-
hending a part of a circle equal to ninety degrees.
In all right-angled triangles, the tides containing the right
angle are called the Legs, as the tides 9 A, A 45 are the legs of
the triangle 9 A, 45, in Fig. 12; and the oppoilte fide to the right
angle is called the Hypothenufe, as the line 9.45, in the triangle
9 A, 45, is the hypothenufe tide of that triangle.
“ The perpendicular height of any triangle is a line drawn
from the vertex to the bafe perpendicularlythus if the tri-
angle PEO, Fig. 15, be propofed, PO muft be contidered as its
bafe, and confequently E its vertex; and if from E you draw the
line E P perpendicularly to P O, then the line E P is the height
of the triangle EPO, Handing on PO, its bafe.
No. 9, is a triangle called Scalenous, becaufe none of its
fidcs are equal, nor its angles alike in quantity. A Scalene Tri-
angle is compofed of two kinds of angles, one obtufe, and the
other acute; fo alfo a right-angled triangle is compofed of two,
a right one, and an acute.
5
All
No. 8, is a Right-angled Triangle, becaufe two of its fides
are perpendicular to each other, and confequently make an
angle of ninety degrees, as the line 9.90% Fig. 12, is perpendicular
to B A, therefore A 9.900 forms a right-angled triangle, compre-
hending a part of a circle equal to ninety degrees.
In all right-angled triangles, the tides containing the right
angle are called the Legs, as the tides 9 A, A 45 are the legs of
the triangle 9 A, 45, in Fig. 12; and the oppoilte fide to the right
angle is called the Hypothenufe, as the line 9.45, in the triangle
9 A, 45, is the hypothenufe tide of that triangle.
“ The perpendicular height of any triangle is a line drawn
from the vertex to the bafe perpendicularlythus if the tri-
angle PEO, Fig. 15, be propofed, PO muft be contidered as its
bafe, and confequently E its vertex; and if from E you draw the
line E P perpendicularly to P O, then the line E P is the height
of the triangle EPO, Handing on PO, its bafe.
No. 9, is a triangle called Scalenous, becaufe none of its
fidcs are equal, nor its angles alike in quantity. A Scalene Tri-
angle is compofed of two kinds of angles, one obtufe, and the
other acute; fo alfo a right-angled triangle is compofed of two,
a right one, and an acute.
5
All