Part 2 Werk backwards to find the number of stones that were in the original arch 10 Trapezoid ERGH represents the trapezoid stone that Trey found Use your picture from
Drew a picture that shows the date and the
won that you now 1 point
to find the measures of the interior angles of trapezoid EFGH ( point
is this is an ice trapezow do you know? (1 point
G
H
24 anglo
Understand the problem Measuring an existing arch.
E
F
Part 1: Serena's drawing
Follow these steps to find the anges of the trapezoida in Serena's drawing the angles other
trapezoid match the angles of the trapezoid stone, then her drawing is correct
BAC=20
DB-100
BDK-80
2
11 Imagine that the stone is part of an arch and that there is an isoscelestrongle JEF formed by
extending sides GE and HF downward
the measure of angle BAC Hint What is the sum of the measures of the vertex anges of the
ngruent isosceles triangles (1 point)
"BAC-20