Five-Minute Check (over Lesson 11–1)
CCSS
Then/Now
New Vocabulary
Key Concept: Area of a Trapezoid
Example 1: Real-World Example: Area of a Trapezoid
Example 2: Standardized Test Example: Area of a Trapezoid
Key Concept: Area of a Rhumbus or Kite
Example 3: Area of a Rhombus and a Kite
Example 4: Use Area to Find Missing Measures
Concept Summary: Areas of Polygons
Content Standards
G.MG.3 Apply geometric methods to solve
problems (e.g., designing an object or
structure to satisfy physical constraints or
minimize cost; working with typographic grid
systems based on ratios).
Mathematical Practices
1 Make sense of problems and persevere in
solving them.
7 Look for and make use of structure.
You found areas of triangles and
parallelograms.
•  Find areas of trapezoids.
•  Find areas of rhombi and kites.
•  height of a trapezoid
Area of a Trapezoid
SHAVING Find the area of steel used to make the
side of the razor blade shown below.
Find the area of the side of the pool outlined below.
Area of a Trapezoid
OPEN ENDED Miguel designed a deck shaped like
the trapezoid shown below. Find the area of the
deck.
Area of a Rhombus and a Kite
A. Find the area of the kite.
Area of a Rhombus and a Kite
B. Find the area of the rhombus.
A. Find the area of the kite.
B. Find the area of the rhombus.
Use Area to Find Missing Measures
ALGEBRA One diagonal of a rhombus is half as
long as the other diagonal. If the area of the
rhombus is 64 square inches, what are the lengths
of the diagonals?
Trapezoid QRST has an area of 210 square yards.
Find the height of QRST.
11.2 HW:
P. 793
8-28E, 44