Isocseles I Saw

Another Catriona Shearer puzzle.

13.
Isosceles I Saw

All 4 triangles are isosceles. What’s the angle?

Spoiler!
Continue reading “Isocseles I Saw”

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Spike in the Hive

Our next Catriona Shearer puzzle.
12.
Spike in the Hive


Two of the regular hexagons are identical; the third has area 10. What’s the area of the red triangle?

Spoiler!
Continue reading “Spike in the Hive”

Semicircle Turducken

Here’s another of those Catriona Shearer puzzles that had me stumped for a while.

7.
Semicircle Turducken

This looks ridiculous. There are no lengths, areas, or angles given, but you’re supposed to figure out an angle?

Spoiler!

Continue reading “Semicircle Turducken”

The Garden of Clocks

Last week Math With Bad Drawings published a bunch of geometry puzzles by Catriona Shearer. I’m about ready to talk about the first one!

1.
The Garden of Clocks

What fraction of each circle is shaded? (The 12 dots are equally spaced; the only point used inside the circle is the centre.)

Spoilers!

Continue reading “The Garden of Clocks”