# data[].attributes.headline
The central and pheriferal angle of the circle

# data[].attributes.subject
The central and pheriferal angle of the circle

# data[].attributes.body
a² - b² = (a-b)(a+b)

# data[].attributes.headline
Pythagorean theorem 2 - proof without words

# data[].attributes.subject
Pythagorean theorem 2 - proof without words

# data[].attributes.headline
Pythagorean theorem - proof without words

# data[].attributes.subject
Pythagorean theorem - proof without words